日蒸发率是评价高真空多层绝热杜瓦保冷性能最重要的技术参数. Daily evaporation rate is an important technology parameter to evaluate the heat - insulating property of cryogenic dewar.
玛格丽万分悲痛的家人努力从丧亲之痛中恢复过来。Margery's grieving family battled to come to terms with their loss.悲痛之下，她泪眼蒙眬。Her eyes dimmed with sorrow.女王为他的去世悲痛不已。The Queen was grief-stricken over his death....
White supremacists devise new Methods: To disenfranchise Negroes.白人至上论者想出新的方法以剥夺黑人的公民权.Abraham Lincoln called on his people to fight for freedom for all — Negroes and Whites.亚伯拉罕·林肯号召他的人民为所有的人——黑人和白人的自由而战斗.Everywhere the...