Chinese phrase
万一〜 wàn yī 〜
Meaning
If ___ should happen
When to use it
It presents an unlikely condition and a possible result. It often marks a precaution or backup plan and has a cautious tone.
Example dialogue
我们按计划出发，万一明天下雨，就改在室内开会。 wǒ men àn jì huà chū fā wàn yì míng tiān xià yǔ jiù gǎi zài shì nèi kāi huì
Let's leave as planned. If it should rain tomorrow, we'll hold the meeting indoors.
好的，我会把场地改成室内。 hǎo de wǒ huì bǎ chǎng dì gǎi chéng shì nèi
All right, I'll change the venue to an indoor location.