Copper is a good medium for the conduction of heat and electricity.铜是热和电的良导体.Temperature becomes uniform by heat conduction until finally a permanent state is reached.温度通过热传导变得一致，直到最终达到恒定状态。There is hardly any conduction...
If the current trend continues, black farmers in the United States may be extinct by the end of this decade...如果当前趋势继续发展下去，美国的黑人农民将在这个十年末不复存在。...efforts to build up the prestige of the United Nations...为树立联合国的威望所作的努力I sc...
The flywheel provides a mounting location for the clutch assembly as well.飞轮为离合器总成提供了安装位置.The party has attracted a clutch of young southern liberals.聚会吸引了一群南部的年轻开明人士。He lost his clutch on the rope and fell.他抓不住绳子, 松手摔了下...