「不期而至」英文怎么说？

come/crawl out of the woodwork 

突然出现、不期而至

Ever since Olivia won the lottery, her so-called relatives have been coming out of the woodwork. 

自从Olivia中了彩票以后，不知道从哪里冒出来很多她的所谓的亲朋好友。

If you try to lose weight, people will come out of the woodwork to offer advice. 

只要你一开始减肥，就会有一帮人冒出来给你出谋划策。