Not all plugs are three pronged and some tools have only a two prong plug.
并非所有的插头都有三个插脚，某些工具的插头只有两个插脚。
While no two cell phones can use the same charger, carmakers have agreed on the basic design of a common five-prong plug for use across the industry.
虽然没有任何两部手机可以使用相同的充电器，但汽车制造商们却出炉了一个业内通用五项插头的设计方案。
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