二百五十多年前的惠更斯目镜今天还在广泛使用.The Huygens ocular , which dates back over 250 years is still in wide use today.此时场镜上的划痕和小点会在接目镜中看见.Then the scratches and spots on the field lens would be visible at the eye lens.在这两种仪器中, 物镜所成的象都是通...
Grade cutoff is sharp within inches.数英寸内的品位变化很急剧.The amendments provide several other sanctions, including a cutoff of federal highway funds.修正案提供了几种其他制裁, 其中包括中止联邦公路资金.These cutoff values are by no means recommended valu...
His part in the affair was quite open and aboveboard.他参与这件事完全是正大光明的.I think everything ought to be aboveboard.我觉得什么事情都应当开诚布公.His business dealings were aboveboard.他的生意来往是光明正大的.I didn’t have to bribe anyone；it was all ope...