This is the fifth space walk they had to do on this mission.
这已经是他们为完成此项任务所做的第五次太空行走。
Domestic airlines have lost a fifth of their passengers in the space of a year.
国内航线在一年内损失了五分之一的客源。
Thin space: A type spacing piece equal to one-fifth of an em.
薄空铅：相等于正方五分之一的活字间隔材料。
Thin space: A type spacing piece equal to one-fifth of an em.
薄空铅：相等于正方五分之一的活字间隔材料。
应用推荐