1、happen
（偶然）发生，出现
We cannot say for sure what will happen.
我们无法确定会发生什么事。
The accident happened close to Martha's Vineyard.
事故发生在玛莎葡萄园附近。
（作为结果）发生，产生
She wondered what would happen if her parents found her.
她不知道如果父母找到自己会有什么结果。
He trotted to the truck and switched on the ignition. Nothing happened.
他匆匆走向卡车并转动点火开关，结果没有任何反应。
（尤指不愉快的事）发生（在…身上）;(某人)遭到;遇到
If we had been spotted at that point, I don't know what would have happened to us.
如果当时我们被发现了，我不知道会有什么后果。
It's the best thing that ever happened to me.
这是我所遇到的最好的事情了。
2、avoid
避免,防止（坏事发生）
The pilots had to take emergency action to avoid a disaster.
飞行员不得不采取紧急措施避免灾难的发生。
Women have to dress modestly, to avoid being harassed by the locals.
女士穿着应当庄重，以免受到当地人的骚扰。
避免（做…）
By borrowing from dozens of banks, he managed to avoid giving any of them an overall picture of what he was up to.
他向许多银行借款，使得任何一家都搞不清楚他到底要做什么。
He was always careful to avoid embarrassment.
他总是小心谨慎地避免尴尬。
躲开（人、事物）；回避（话题）
She eventually had to lock herself in the toilets to avoid him.
她最后只好把自己锁在厕所里来躲开他。
All through lunch he had carefully avoided the subject of the house.
整个午饭期间，他一直在小心翼翼地回避房子的话题。