The combination of thinking sources means novelty, open thinking, intelligence, extraordinary ambition and hard work. This word has no origin. The original meaning of thinking is in-depth thinking and consideration, which produces nostalgia, sadness, ideas and creativity. The original meaning of the word source refers to the beginning of water source, source and water flow, and is extended to origin, root and source.

Think about the source and make a sentence:

( 1)? Think of the source of drinking water, and don't forget to dig wells when drinking water.

(2) When you grow up, you should drink water and think of the source to repay your parents' kindness.

(3) If a person can't drink water and think of his own source, is he still a person?

(4) I only hope that children can drink water and think of the source, and don't be ungrateful.

(5) I owe you today, and tomorrow I will drink water and think of the source, and I will make grass sound in return.

(6) Where did today's happy life come from? The students stood in front of the martyrs' monument, drinking water and thinking of the source, remembering the great achievements of the revolutionary martyrs, and their mood could not be calm for a long time.

(7) Be grateful for drinking water and thinking of the source.

(8) Today's happy life is hard-won. We should drink water and think of the source, and never forget our responsibilities.

(9) I can have today's achievements, and I will never forget my teacher's cultivation.