Oxygen obtained from liquefied air is usually about 99.5 % pure.由液化空气所取得的氧其纯度通常约为99.5%.The production of cold involves the production of liquefied gases.冷量生产涉及到液化气的生产.Chlorine is usually liquefied before use or storage.氯...
气室通过呼吸器与大气相通.Air chamber is connected to air through breather.报告了采用直接从铯蒸汽气室而不用磁光阱实现了光学粘团的方法.Usually the magneto optical trap ( MOT ) is used to obtain the cold atoms from the vapor.此时, 助力器的真空气室 、 应用气室被隔开.At this point, t...
Lacking self-confidence and maturity, many teenagers are left feeling very vulnerable.许多十几岁的孩子既缺乏自信又不够懂事，所以感情上十分脆弱。Girls generally reach sexual maturity two years earlier than boys.通常女孩性发育成熟要比男孩早两年。Customers are told wha...