不要不懂装懂，尽量听出言外之意。

Try to hear the meaning behind the words without presuming you already know.

youdao

刻苦钻研，不要不懂装懂，有问题主动问老师；

Study intensively, never pretend to know all, and ask the teachers if having questions.

youdao

请在你不是很了解某事的时候克制着自己，不要不懂装懂。

Refrain from blathering on about something you really don’t have a solid understanding of.

youdao