But firefighting crews currently use them only as a kind of reactive tool.

不过，消防队员们仅将防火剂作为一种非主动使用的工具。

So the firefighting crews were able to tackle the fire before they weren't.

因此，消防人员能够及时扑灭火灾。

There's also a sport called " crew, " and a famous clothing company called " JC Crew." Here, we're talking about firefighters and firefighting crews, however.

。 还有一种运动叫做“crew” ，还有一家著名的服装公司叫做“JC Crew” 。不过，这里我们说的是消防员和消防员。