We know about magnetism by the way magnets act.我们通过磁铁的作用知道磁性是怎么一回事.The N pole and S pole of two magnets will attract each other.两个磁体的N极和S极互相吸引.The entire ring has about 1000 magnets spaced at regular intervals.整个圆环由大约100...
He arrived with a police escort shortly before half past nine.快到9点半的时候，他在一名警察的护送下到达了。The prisoner was taken under escort to the jail.罪犯被押送到监狱.Her escort to the party was a tall young man.陪同她参加晚会的是一位高个子男青年....
Marine snakes use a similar desalting mechanism.海蛇也运用类似的脱盐机制.Principal application of reverse osmosis has been in desalting brackish waters for domestic consumption.反渗透主要应用于生活用含盐水的脱盐.High velocity electrical desalting te...
Rectifier units with a capacity of 20 to 25 amperes for each charging circuit are acceptable.每条充电线路可容纳容量为20―25安培的整流装置.The current from these parallel generators will add up to make a total flow of 500 amperes.这些并联的发电机所产生...