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”, 因只有与火柴盒发生摩擦之后才会燃。

By rubbing the head of a match against this sandpaper, heat is produced.

将火柴头在砂纸摩擦就能够产生热量。

A " spark, " technically, is what happens, for example, if you were to take a match and strike it against a stone;it might create a spark.

一个“火花” ，从技术讲，就是比如你拿一根火柴， 在石头摩擦， 可能会产生火花。

If you don't have a lighter or matches, you need to use friction to create an ember.

如果你没有打火机或火柴，你需要通过摩擦产生火花。