Last year the millionth truck rolled off the assembly line.去年，第100万台卡车驶下流水线。He is best remembered for the introduction of the moving assembly-line.他最为人铭记的创举是率先采用流水装配线。The assembly line of necessity kept moving.生产线势必保持运转下...
...a frequency of 24 kilohertz.24 千赫的频率They sat aside 100 channels, each 200 kilohertz wide.他们在旁边坐了100种渠道, 各200千赫宽.Twisted - pair conductors are sufficient if frequencies of interest are below a few hundred kilohertz.如果信...