Not all plugs are three pronged and some tools have only a twoprong 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。
2
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。
3
You can easily see if this is being done because there are two cables coming out of the sensor, one with a typical two-prong temperature lead, and the other going into a transducer cylinder.