上下行程 Vertical stroke
上下行最大可达到速率 Maximum attainable bit rate
主臂上下行程 Vertical stroke
轿内上/下行手动运行 CUPD
执行上下文 execution context
工作台上、下行程 Table vertical mm
上下行型 ascending-descending type
上行下给式 up feed system
执行上下文栈 Execution Context Stack
上行下效 teach by precept and example ; Superiors acting and inferiors imitating
自战后全盛时期以来，铁路网络已经缩减了约三分之一，但现在全国上下行驶的列车比以往任何时候都多。
The network has shrunk by roughly a third since its postwar heyday, but more trains now trundle up and down the country than ever before.
因此，他在剑滩海边上下行走了三次。
Three times therefore he walked up and down at the edge of the sea.
减速并观察铁路上下行方向。
应用推荐