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An activity to practise leaving a place quickly so that people know what to do if there is a fire. 一种练习快速离开一个地方的活动，这样人们就知道如果发生火灾该怎么做。

A small boat carried on a large ship for use in an emergency载在大船上用于紧急情况的小船

To speak in a very quiet voice. 用很轻的声音说话。

A cloud of gases that rises from something that’s burning. 燃烧时产生的一团气体

To practise a piece of music, a play etc, before you perform it in front of people

排练在演出前先练习一段音乐、戏剧等

The number 1,000,000

To happen or affect people with force强迫:用武力发生或影响人们

To tell someone about something so it is easy to understand把某事告诉某人，使她容易理解

a serious and often dangerous situation requiring immediate action.很严重且危险的情况需要立刻行动

An investigation to test or discover something.为测试或发现某事而进行的调查