"Crystal" is an adjective, which means "very clear and bright, as transparent as crystal". It can also be used to describe transparent objects such as jewelry or white jade. For example, "Snowflakes are crystal clear in the sun".

"Crystal clear" and "crystal clear" are not exactly the same. "Crystal clear" is a combination of two adjectives, emphasizing the crystal clear characteristics of articles. The word "crystal clear" contains the meaning of crystal clear, but more emphasis is placed on the bright and shining commodity characteristics.

The word "crystal clear" appeared in Zhuangzi very early, which means "crystal clear appearance". Later it gradually evolved into today's meaning. In China literature, art and other fields, we can often see the use of this word. For example, Bai Juyi's "Farewell to Ancient Grass" in the Tang Dynasty said that "the vast grass crosses the plain and comes and goes with the four seasons.

Wildfire can't burn it out, but the spring breeze can revive it. Weeds and wild flowers are all over the ancient road, and the end of the grass in the sun is your journey. I once again sent my bosom friend, and the thick grass represented my deep affection. ",in which" green "means" reaching the crumbling gate ". Also related to "crystal clear" are: crystal bright, crystal bright, colored glaze, crystal and so on.

Although these words are slightly different in describing objects and meanings, they all have such strong optical properties as "crystal clear". The word "crystal clear" is one of the words to express the transparency and brightness of objects, which is widely used in China literature, art and other fields. At the same time, there are many similar words related to them, and the differences and connections between them can be understood through comparison.

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Pinyin is the process of pinyin festival, that is, according to the rules of syllable formation in Putonghua, the initials and finals are quickly and continuously spelled and combined with tones to form a syllable. China didn't have pinyin letters at that time, so we used the method of orthography or anti-tangent of pinyin Chinese characters.

Direct pronunciation means using homophones to express the pronunciation of Chinese characters. If homophones are uncommon words, they can't be read even if they are pronounced. Backcutting is to use two Chinese characters to phonetic another Chinese character.

The initials of the upper word are the same as the notes, and the finals and tones of the lower word are the same as the notes. Mr. Zhou Youguang called reverse cutting "center cutting welding method". These two methods of phonetic notation are inconvenient to use.