在发生事故时，安全气囊可以拯救你的生命。

An airbag could save your life ___in ___the ___event ___of an accident.

如果天气不好，明智的做法是计划一个替代活动。

___In ___the ___event ___of bad weather, it would be wise to plan an alternative activity.

公司备有备用发电机，以防停电。

The company has a backup generator ___in ___the ___event ___of a power failure.