HSK 5
交换
jiāohuàn动
to exchange; to swap; to switch (telecom); commutative (math)
我们交换了彼此的联系方式。
Wǒ men jiāo huàn le bǐ cǐ de lián xì fāng shì.
We exchanged contact information.
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New in the HSK 3.0 word list at level 5.