gain an impression的用法和樣例：
例句
- The first time you meet someone,in the first moment you form an impression in your mind of that person.
當你與某人初次見面時，你首先就在腦子裡對他形成一個印象。 - We must not give the impression that only one particular individual made mistakes while all the others were correct.
我們不要造成一個印象，好像別人都完全正確，唯獨一個人不正確。
