In that way they work like a magnet; and everyone knows that if you pick up a pin with a magnet, any other pin which is touching the first pin will come too.

这样他们就像磁铁一样工作；每个人都知道，如果你用磁铁拿起一个大头针，任何其他接触到第一个大头针的大头针也会随之而来。