电磁波是由一种称为速调管的微波电子管产生的.The electronmagnetic wave is produced by microwave tubes called klystrons.这些工厂生产电子管 、 晶体管 、 收音机和电视机.These factories produce tubes, transistors, radio sets and TV sets.这些放大器是用微型电子管制成的.These amplifier...
NP , OP : used for pesticide emulsifier, wetter and other industrial surfactant.用于农药乳化剂, 可湿性粉剂及其它工业用表面活性剂.Rapid evaporation at the heating - surface tends to make the steam wetter.加热面上的迅速蒸发,往往使蒸汽的湿度变大.William wants to kn...
I'm sick of reading headlines involving the Kennedys in sex scandals.关于肯尼迪家族性丑闻的新闻标题都让我读得腻烦了。A girl was killed yesterday in a crash involving a stolen car.昨天有一女孩在一桩涉及窃车的撞车事故中丧生。He tried to be not involving himself i...