Going up and down stairs will be good exercise for me.
上上下下爬楼梯对我会是的锻炼。
Do you get puffed out running up and down the stairs?
你会因为跑上跑下楼梯而气喘吁吁吗？
We walked in silence up a flight of stairs and down a long corridor.
我们默默地走上一段楼梯，穿过一道长廊。
Walk up and down the stairs, instead of taking the lift.
—用步行上下楼梯来取代搭乘电梯。
Then he went down stairs and woke up the porter.
他随即走下楼去，叫醒那看门人。
The dog ran up and down the stairs.
那条狗在楼梯上来回跑。
During the game to be safe, up and down the stairs without fighting.
课间游戏要安全，上下楼梯不打闹。
Up and down the stairs right away, no pockets don't run and jump.
上下楼梯靠右走，不插口袋不跑跳。
Always takes the stairs up and down the five flights to his office ace.
他总是在五级楼梯上爬上爬下进入他自己的工作天地。
Go get some water. Use the restroom. Or walk up and down the stairs.
去喝点水，上上厕所，或上下楼梯。
Up and down the stairs it ran.
它在楼梯上来回奔跑。
Walking down and up the stairs would beat any exercise machine.
上下楼梯课比什么健身器材都有用。
Walking down and up the stairs would beat any exercise machine.
上下楼梯课比什么健身器材都有用。
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