帶上一把傘，以防萬一。
Bring an umbrella, just in case.
Listen to pronunciation
Example sentences
對這種人不可不防。
对这种人不可不防。
You must be on guard against this kind of person.
颱風來臨前要準備蠟燭，以防斷電。
Before a typhoon comes, you should prepare candles in case of a power outage.
他把重要文件備份到雲端，以防不虞。
He backed up the important files to the cloud in case something went wrong.
工廠在零件表面鍍鎳，以防生鏽。
The factory plates the parts with nickel to prevent rust.
Usage Notes
Means to take precautions or defend against something.
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