她一个人在床上爬上爬下，走到卧室门口，打开了门。
She by herself got up and down her bed, walked to the bedroom door and opened it.
这意味着，我们要在山狮居住的山边爬上爬下，虽说我只听到过狮子的声音，从未亲眼见过。
This meant climbing up and down the side of a mountain inhabited by mountain lions, although I should say they were only heard, never seen.
扫把在阶梯爬上爬下，卖力地工作！
The broom went up and down the steps. It was working very hard!
她开始上梯子，爬上爬下地递着稻草。
She started to go up and down the ladder, carrying the straw.
这男孩在梯子上爬上爬下的。
狮子睡着了，有只老鼠在他的周围爬上爬下。
When a lion was sleeping, a mouse began creeping up and down beside him.
他老是说要把他埋在他小时候爬上爬下的日晷旁边。
The sundial is the oldest known device for the measurement of time.
他总是在五级楼梯上爬上爬下进入他自己的工作天地。
Always takes the stairs up and down the five flights to his office ace.
我还记得我看着邻居皮托顺着太平梯爬上爬下救人逃生。
I remember seeing my neighbor Pito go up and down the fire escape to get people out.
蜥蜴在野外捕食的时候通过在树上爬上爬下来迫使猎物出来。
Lizards in the wild capture moving prey by running up and down trees, Dr. Leal said.
寝室里家长爬上爬下、忙里忙外，孩子则在一旁吃零食打电话。
Parents bedroom, climb up and down, busy, busy, the children eat snacks in a phone call to one side.
来到岸边，大家一起探索漂亮的白色海崖，爬上爬下，不亦乐乎。
At the seaside, babies are busy in exploring the beautiful white cliff, climbing up and down with happy smile on their faces.
它们绕着树干爬上爬下地互相追逐着，带着一种强烈的快乐和欣喜。
They chased each other round and round the trunk, up and down, with a fury of pleasure and delight.
这回他们那兴奋的话题是蔚蓝的海洋、金黄的沙滩，和壁虎爬上爬下的围墙。
They fell a-twittering among themselves once more, and this time their intoxicating babble was of violet seas, tawny sands, and lizard-haunted walls.
他是个胖乎乎的逗人喜欢的小家伙，他的脚不停地爬上爬下，追逐昆虫、鸟和我。
He was a very likable chubby little thing, always on his feet climbing up and down, chasing after insects, birds, and me.
我们需要教宝宝们如何用脚爬下，然后他们就能在所有的场合安全的爬上爬下了。
We need to teach them how to climb down using their feet, then they can climb down safely from almost anywhere.
我们需要教宝宝们如何用脚爬下，然后他们就能在所有的场合安全的爬上爬下了。
Now they need to know what to do when they get to the top so they don't fall.
到处是黑人，倾身匍匐在地，海鳝，小龙虾，尖头蟹，在他们身上爬上爬下，爬东爬西。
Negroes are prostrate everywhere and morays and crawfish and spider crabs are moving around and over their bodies.
一条狭窄的小路穿过这道篱笆墙，林中空地有一座小山丘，她年轻时动作敏捷地爬上爬下。
A narrow path crossed through this hedge, and at the opening was a little hill that she ascended and descended as nimbly as a young woman.
比如说，地面机器人，被设计为能爬上爬下瓦砾堆以及进入人类难以进入的裂缝搜寻幸存者。
There are ground-based robots, for example, designed to climb up and down piles of rubble and slither into otherwise inaccessible cracks to look for survivors.
我需要使用一架梯子来帮助我爬上爬下，以后还需要将这个访问点升级成一个更可靠的系统。
Those trips up and down the ladder convinced me that I needed to upgrade the access point to something more industrial-strength. My next-generation hardware would have to.
十八世纪后期发明电梯以前，建筑物小多了而且远没有这么高，因为人们不想整天爬上爬下。
Before the elevator was invented in the late 1800's, buildings were much smaller and less tall, as people did not want to walk up and down stairs all day.
狮子睡着了，有只老鼠在他的周围爬上爬下，很快吵醒了狮子，狮子很生气，一把抓住了老鼠。
When a lion was asleep, a little mouse began running up and down beside him. This soon wakened the lion. He was very angry, and caught the mouse in his paws.
大在夏天和秋天变黄的树叶是绿色的，鸟儿在树上建造他们的房子，蚂蚁爬上爬下为自我的生活。
Its big leaves are green in summer and turn yellow in autumn, birds build their house in the tree, ants climb up and down for their own lives.
在我们小时候，像这样的比赛经常有。不需要任何特别的理由，我们就能享受跑、跳、爬上爬下的乐趣。
When we are kids competitions like this come to us naturally and we enjoy running, jumping, falling, and climbing without any particular reason.
扫把在阶梯爬上爬下，卖力地工作！慢慢地，浴缸就满了。小伙子看着这支扫把，同时在想它还能做些什么。
The broom went up and down the steps. It was working very hard! Slowly, the tub grew full. The boy was watching the broom. He was thinking about the jobs the broom could do.
扫把在阶梯爬上爬下，卖力地工作！慢慢地，浴缸就满了。小伙子看着这支扫把，同时在想它还能做些什么。
The broom went up and down the steps. It was working very hard! Slowly, the tub grew full. The boy was watching the broom. He was thinking about the jobs the broom could do.
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