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

将火砂纸上进行摩擦就能够产生热量。

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

有些火被称作“安全火”, 因为它们只有与火生摩擦之后才会燃烧。

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

如果您没有打火机或火，则需要利用摩擦来产生余烬。