This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

World War II lasted from 1939 to 1945.

This is the second time he's been late. Well, they say what happens twice will happen three times.

Him calling me lazy is truly a case of the pot calling the kettle black.

He chose a stable job, saying 'a bird in the hand is worth two in the bush.'

The 正十六胞體 is one of the regular polytopes in four dimensions.

The 16-cell is one of the convex regular polytopes in four dimensions.

Whenever he faced a difficult situation, he always said, 'The best of the Thirty-Six Stratagems is to run away.'

He faced difficulties with the spirit of 'one eye, two feet, three gallbladders, four strengths'.