這件事很棘手，不知該從何下手。
This matter is very tricky, I don't know where to start.
Listen to pronunciation
Example sentences
事情突然變得複雜，我不知如何是好。
事情突然变得复杂，我不知如何是好。
The situation suddenly became complicated, and I did not know what to do.
這些格言不知流傳了多少世代。
These mottos have been passed down for many generations.
他失蹤後至今不知去向。
His whereabouts are still unknown after he went missing.
他說話總是不知深淺，經常讓氣氛變得很尷尬。
He always speaks without knowing the proper measure, often making the atmosphere very awkward.
Usage Notes
A concise, slightly formal way to say someone does not know or understand. It often appears before question-like phrases such as 如何 and in fixed expressions.
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