先下后上
- 网络First down, then up;Please let passengers get off / alight first
先下后上-
这边的人们也非常有礼貌，坐公交车不会挤，先下后上。
Canadian are also very polite , they won 't cut line to take bus .
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乘坐公共汽车应先下后上，勿争先恐后，勿挤逼抢位。
Should take after the bus , not to vie with each other , not Bicheng bit crowded .
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针对银行全库的结构特点，采用先下后上、先内后外、断口倒墙的方法，对金库进行了安全高效的爆破拆除。
In accordance with the structural characteristics of treasury , a method of " blasting the lower part before the upper part , the inner part before the Outer part , and collapsing along breach " was adopted to effectively demolish the treasury .