兑

我去银行兑点欧元

wǒ qù yínháng duì diǎn ōuyuán

I went to the bank to exchange some euros.

这张券可以兑现金

zhè zhāng quàn kěyǐ duì xiànjīn

This voucher can be exchanged for cash.

把药兑点水再喝

bǎ yào duì diǎn shuǐ zài hē

Dilute the medicine with a little water and then drink it.