Meaning of chú fēi:
chú fēi
除非
Conjunction
only if (..., or otherwise, ...); only when; only in the case that; unless
Chúfēi xiàyǔ, wǒmen cái huì dāi zài jiālǐ.
除非下雨，我们才会呆在家里。
Only if it rains, we will stay at home.
Wǒ bù huì qù, chúfēi nǐ yě qù.
我不会去，除非你也去。
I will not go unless you go too.
Wǒmen bù huì qù jiāoyóu, chúfēi tiānqì hǎo.
我们不会去郊游，除非天气好。
We won't go on a picnic unless the weather is good.
Nǐ wúfǎ chénggōng, chúfēi nǐ nǔlì gōngzuò.
你无法成功，除非你努力工作。
You cannot succeed unless you work hard.
