If you pretend to know what you don't know,you'll only make a fool of yourself.
不懂裝懂就會鬧笑話.
2.假裝在做某事
Yet it needs,as a political matter,to pretendto be doing something.
但是,從政治方面來考慮,它還是需要裝模作樣,擺擺姿態.
3.假裝已經做了某事
He pretended to have forgotten the conversation afte rthat night.
他假裝已經忘記這個除夕所說的話.