英语释义
1. a conductor used to establish electrical contact with a nonmetallic part of a circuit
2. an element in a semiconductor device (such as a transistor) that emits or collects electrons or holes or controls their movements
3. one of the two points through which electricity flows into or out of a battery or other device
4. a conductor (as a metal or carbon) used to make electrical contact with a part of an electrical circuit that is not metallic
5. a conductor used to establish electrical contact with a nonmetallic part of a circuit