如果

if; in case (of); in the event of

♦ ~不是他指引的话, 我们就迷路了。 If it weren't for him, we would have gone astray.

♦ ~发生火警, 拨119电话。 In case of fire, dial 119.

♦ ~下雨, 联欢会将在室内举行。 In the event of rain, the party will be held indoors.