There are some matches called " safety matches, " which will light only when they are rubbed on the box.

有些火柴被称作“安全火柴”, 因为它们只有与火柴盒发生摩擦之后才会燃烧。

The saint his some safety matches, a safety belt, a safety pin, and a safety razor in his saddle then set off.

圣贤在他的马鞍里藏了些安全火柴、安全带、安全别针和安全剃刀，然后出发了。