英语
西班牙语
单语范例（未经PONS编辑处理）
Metals such as rebar are accepted, since they can be removed with magnets and other sorting devices and melted down for recycling elsewhere.
en.wikipedia.org Powerful magnets were also a problem for him.
en.wikipedia.org The field of the magnet is modulated by the passing target teeth.
en.wikipedia.org These problems were fixed and the school now hosts magnet programs.
en.wikipedia.org The spinning magnet was positioned so that its north and south poles passed by a piece of iron wrapped with insulated wire.
en.wikipedia.org