失火的英文：
catch fire
fire (alarm)

参考例句：

In case of fire, ring the alarm bell.
万一失火的话，请按警铃。

There was a stampede of panic-stricken crowd from the burning hotel.
从失火的旅馆中跑出来乱窜的惊惶失措的人群。

Three removes are as Bad as a fire
三次搬家犹如一次失火

Three remover are as bad as a fire
搬家三次等于失火一次

The fire caused a tumult in the theater.
失火使剧院里发生骚乱。

The firemen played their hoses on(ie directed them at)the burning building.
消防队员用水龙向失火的建筑物喷水.

Ten people burnt to death in the hotel fire.
旅馆失火，烧死了10人。

Police and the villagers all unanimously ascribed the forest fire to thunder and lightning.
警方和村民一致把森林失火归因于雷电。

His account of the fire accident includes a lot of extraneous details
他对失火事件的描述含有大量离题的细节。

That boy was rescued from a burning house.
那个男孩被人从失火的房子中救了出来。

catch是什么意思：
v. 抓住；捕获；撞见；赶上；感染；钩住；引起；理解；描绘；当接球手；燃烧
n. 抓住；捕获量；锁钩；隐患，陷阱；抛接球游戏；如意伴侣
adj. 使人感兴趣的；令人容易上当的

Catch as catch can.
能抓尽管抓(能拿多少算多少)。

Colds are catching.
感冒是有传染性的。

The cobweb pretends to catch dewdrops and catches flies
蛛网好象要捉露点，却捉住了苍蝇。

fire是什么意思：
n. 火；炉火；火灾；热情；激情；磨难；炮火
v. 点燃；烧制；烘制；激励；充满激情；解雇；着火；开枪

The fire raged.
大火熊熊燃烧。

They fired at the robbers.
他们向强盗开枪。

The house was on fire.
房子起火了！

alarm是什么意思：
n. 警报器；闹钟；惊慌
v. 向...报警；使惊恐

In case of fire, sound alarm.
如遇火警，请拉响警报。

analogue detection and alarm system
模拟量探测器报警系统