作废
zuò fèi
to become invalid, to cancel, to delete, to nullify
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电费不贵
diàn fèi bù guì
Electricity bill is not expensive
肺癌很可怕
fèi ái hěn kě pà
Lung cancer is scary.
网费多少钱
wǎng fèi duō shao qián
How much does the internet cost?
这个免费吗
zhè ge miǎn fèi ma
This is free of charge?
我朋友有肺癌
wǒ péng you yǒu fèi ái
My friend has lung cancer.
赌博是浪费钱
dǔ bó shì làng fèi qián
Gambling is a waste of money.
我会支付小费
wǒ huì zhī fù xiǎo fèi
I'll pay the tip.
我会支付车费
wǒ huì zhī fù chē fèi
I'll pay for the fare.
这个花费不多
zhè ge huā fèi bù duō
This doesn't cost much.
别浪费吃剩菜
bié làng fèi chī shèng cài
Don't waste it, eat the leftovers.