Getter - ion pumps decrease chamber pressure by chemical reaction of residual gases with an evaporated metal.吸气离子泵通过剩余气体与蒸发的金属之间的化学反应减少了内腔的压力.Recent electronic means of pumping using low temperature sorption techniques a...
玻璃对不同颜色的光的折射量不同。Glass bends light of different colours by different amounts.有那么几秒钟，我们注视着水面上那些奇异的光。For a few seconds we watched the unearthly lights on the water.他们指责他是沾了总统的光。They accused him of riding on the coat-tails o...
They believed that good parents should be self-sacrificing and self-denying.他们认为好的父母应该牺牲自我，一心为孩子着想。Opportunism consists of sacrificing fundamental interests in order to gain temporary, partial benefits.机会主义就是牺牲根本的利益,贪图暂时...
约瑟芬聪明、活泼、开朗。Josephine was bright, lively and cheerful.这对于当年的来自得克萨斯州的约瑟芬?金斯基来说,真是天壤之别.It was a far cry from Josephine Czinski of Odessa, Texas.接着,拿破仑为约瑟芬皇后加冕.Napoleon then crowned Josephine Empress....