地球既公转又自转.The earth revolves both round the sun and on its own axis.地球自转与地球绕日公转产生附加的频移.The earth's rotation and its motion around the sun add an appreciable frequency shift.月球的自转与公转精确地同步.In the case of the moon the r...
钻石切割靠的是工匠的技艺。The cut of a diamond depends on the skill of its craftsman.有人偷了某个影星的钻石了吗?Has somebody helped himself to some film star's diamonds?他们被满橱窗陈列的钻石和皮草弄得眼花缭乱。They were dazed by window displays dripping with di...
Hypoid gear transmission is the most complicated transmission. The parameters of ma - chinking are hard to cakulate.准双曲面齿轮是齿轮传动中最复杂的, 其工艺锥参数和加工调整计算都涉及两个相错圆锥的相切接触条件.Fixtures are generally mechanical devices used to assist...