Meaning of huàn:
换
to exchange; to change (clothes etc); to substitute; to switch; to convert (currency)
Tā juédìng qù yínháng huàn yīxiē měiyuán.
她决定去银行换一些美元。
She decided to go to the bank to exchange some dollars.
Wǒ xūyào qù fángjiān lǐ huàn yīfú.
我需要去房间里换衣服。
I need to go to the room to change clothes.
Wǒ xūyào huàn yī zhāng xīn de zhuōzi.
我需要换一张新的桌子。
I need to substitute for a new desk.
Wǒ dǎsuàn míngtiān qù huàn yīfú.
我打算明天去换衣服。
I plan to go and switch clothes tomorrow.
Wǒ xiǎng qù yínháng huàn yīxiē měiyuán.
我想去银行换一些美元。
I want to go to the bank to convert some US dollars.