相同的目录包括一种两极同心插头和插座。
The same catalogue included a type of two-pole concentric plug and socket.
新的探测器在建造时使用了改进的电子设备和电池组，并且添加了新的的雷达高度计，这是一种发射微波测定两极冰层厚度的装置。
The new probe was built using improved electronics and batteries, and an extra radar altimeter, a device that will fire microwaves at the arctic and Antarctic ice to reveal its thickness.
蓄电池有阴阳两极，用导电材料——通常是一种叫做电解质的液体连接。
They have two electrodes, an anode and a cathode, that are connected by an electrically conductive material—generally a liquid—called an electrolyte.
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