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.

I went to the stationery store to buy new letter paper.

Please teach me how to calculate the area of this circular sector.

Please stop inquiring about his private life.

We are implementing a social distancing strategy to prevent the spread of the new coronavirus.

She dyed her hair blue.

Their home is always filled with amiability, to the point where everyone envies them.