HSK 5
万一
wànyī名连
just in case; if by any chance; contingency
万一下雨我们就改到室内。
Wàn yī xià yǔ wǒ men jiù gǎi dào shì nèi.
If it rains, we will move indoors.
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New in the HSK 3.0 word list at level 5.