You can't expect to learn a foreign language in a week.
别指望一个星期就能学会一门外语。
I must contact my lawyer before I make my final decision.
在做出最后决定之前,我必须先同我的律师联系一下。
She always referred to them as 'the shifting population', for they came and went with such frequency that I never even got a chance to learn their names.