重点讲解：
1. open fire 开枪；开火；
The gunmen opened fire on the police.
持枪歹徒向警察开火Wkk@ZN771+t|kSa@7K(。
2. rule out 开枪；开火；
Local detectives have ruled out foul play.
当地的侦探已经排除了他杀的可能性8+ArRV%r8~g。
3. come into force (法律、规定或体系)实施，生效；
The first price increases are due to come into force in July.
第一批提价预计将在7月开始执行1AN~5T&6Nf3*(cP-XE。
4. no longer 不再；已不；
There is a real danger that some people will no longer be able to afford insurance.
一些人很可能再也负担不起保险了%xDc5f;vnX。