不及物动词，常常能实现，简洁、干脆，含义悠长的意味，因为不及物，其后不会跟着一个具体名词；
- other scavengers must defer.（推后）
- It may be many days before she feeds again.（获得给养）
- And when spring comes, they emerge.
- They need to descend as soon as possible.
- Winter in the mountains returns fast and hits hard.
1. 不及物动词短语
- catch on：理解，明白；变得流行；
2. 短小精悍
- love fades.
- HongKong stuck.
- Everyone dies.
