New Words：

accident [ˈæksɪdənt] n. 意外；（交通）事故；意外遭遇；不测事件

Sample Sentences：

He was killed in an accident .
Their early arrival was just an accident.
The poor man died in an accident, leaving his wife and son alone in this world.

arrival [əˈraɪvl] n. 到达;抵达

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