1, English sound? ['sir? (r)], bel canto? ['sir? A form of address for a man.
For example, Mr. Pickwick is a stout, kind, chic and very simple old gentleman.
3. "Mr. Smith, I want to introduce you to Mr. Zhang, who is our factory director." Mr. Smith, I want to introduce Mr. Zhang to you. He is the director of our factory.
I believe, Mr. Garland, my dear sir, we can congratulate each other on this unexpected opportunity. Dear Mr. Garland, I think we should congratulate this great day.
In March, Elizabeth visited her friend Charlotte Lucas in Kent. She is now married to Mr. Collins. In March, Elizabeth visited her girlfriend Charlotte Lucas, who had already married Mr. Collins.
Is it a side suffix? What's the difference between edging and not edging? What's the difference between inside and inside? Is side a suffix? -Yes.
What's the difference between edging and not edging? -the meaning is different. After adding -side, it is "edge (line, surface)"
What's the difference between inside and inside? -inside emphasizes that within a limited scope. Table position can be used interchangeably with in. But in has more meaning than inside.
What's the difference between what needs to be added and what doesn't need to be added? 1, need is a modal verb without to, and there is no need to add auxiliary verbs to change questions or negative sentences.
The structural form of (1) is the prototype of needle t+ verb.
For example, you don't have to do it at once.
(2) The structural form is: need+subject+verb prototype+others.
For example, do you need to do it yourself?
2.need to is a notional verb, which needs an auxiliary verb to change the question or negation.
For example, I don't need to use it to prove myself.
What's the difference between adding Tostring and not adding it? The first is shaping data, which can be used for data manipulation;
The second is a string, which cannot be used as numerical data.
If it's a small number, you can't see the difference. But if it is a large amount of data beyond the scope of scientific counting. Then this shows the difference.
What's the difference between adding S and not adding S? Verb: the third person, usually in the present tense, you need to add s, first and second to the verb, but you don't need it.
Noun: plural plus s, ES, or not (single and plural homographs).
For example:
Fruit and vegetables mean the same thing here. The plural form of a general noun indicates a class of things.
Fruit is homomorphism of simple complex number, that is, there is no complex number form.
Vegetables are countable nouns.
The following nouns are isomorphic in singular and plural: fish, deer, sheep, works (factory), means, Swiss, Chinese China, and there are only plural nouns pants, pants, shorts glasses, passes compasses, scales, pliers and clips scissors. There are three plural nouns of "some China people": (1) Chinese and Japanese. (2) English, French and Dutch plural people want to turn people into people; ; (3) People in other countries who end in -an-an-Ian all add S directly. Such as: Americans, Australians, Indians, etc.
What's the difference between Kate and Mary? The former is subject and predicate, and are is a be verb, and something must be added after it, otherwise it is not a complete sentence. The latter only refers to two names.
C++ adds &; Without &; What is the difference? Represents a reference. Quoting means giving a different name, but still using the original variable.
int a = 10；
int & ampb = a； B is a reference to A, and the operation on B after addition is the operation on A!
b = 20
Cout & lt& lta<& ltendl results in 20.
If you don't add it, it's not a quote.
What's the difference between joining the camp and not joining? Battalion can kill people, but it will also kill people.
If you add camp, you will have your own camp clothes, which can protect the camp BOSS.
After joining the camp, you can do one more routine every day.
Be careful when joining the camp! Be careful of being ambushed!
Add at the end of lua; There is no difference between using local to declare local variables or local functions, and local objects are only valid in the declared code block.
Code block: a control structure, a function body and a chunk (a file or text string) (Lua regards chunk as a function).
In this way, a regional function can be declared inside the block, which is only visible inside the block. Lexical delimitation ensures that other functions in the package can call this function.
When defining multiple local functions in a block and calling each other (or defining local recursive calling functions), it is best to declare them first and then define them.
You should use Local variables (variables declared with the keyword local) as much as possible, which has two advantages:
1. Avoid naming conflicts.
2. It is faster to access local variables than global variables.
Do ... end can be used to display the local control range. Do ... the end in Lua is equivalent to the {} in C++, which defines a scope.
Multi-return value function:
First, when calling a function as an expression, there are the following situations:
1. When calling as the last parameter of the expression or only one parameter, the function returns as many values as possible according to the number of variables, which is not enough to supplement nil and exceeds rounding.
2. In other cases, the function call only returns the first value (nil if there is no return value).
Second, when a function call is called as a function parameter, it is the same as multivalued assignment.
Third, when the function call is initialized in the table constructor, it is the same as when multiple values are assigned.
In addition, the return value of f () is returned in the form of f ():
Parentheses can be used to force a return value.
Unpack: A special function that returns multiple values. It accepts an array as an input parameter and returns all the elements of the array.
Function variable parameters: ... indicates variable parameters, which are accessed by arg in the function body. arg also has a field n, which indicates the number of parameters.
Multi-valued assignment is usually used to exchange variables or return function calls to variables:
When calling a function, if the parameter list is empty, you must use () to indicate that this is a function call.
There is one exception to the above rule. () is optional when the function has only one parameter and the parameter is a string or table structure.
Functions used by Lua can be written in Lua or other languages. For Lua programmers, the functions implemented in any language are the same. (This is the advantage)
What's the difference between adding S to a mobile phone and not adding S? Function optimization.