| 单词 | drain | 
| 释义 | drain [drān]  CIVIL ENGINEERING 1. A channel which carries off surface water.  2. A pipe which carries off liquid sewage.  ELECTRICITY See <<current drain>>  ELECTRONICS The region into which majority carriers flow in a field-effect transistor; it is comparable to the collector of a bipolar transistor and the anode of an electron tube.  | 
	
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