他们正躺在一棵树下睡觉，鼾声大作，使得树枝上下摆动。
They lay sleeping under a tree, and snored so that the branches waved up and down.
从侧面看，这座宝塔就像在跳蛇舞——每一层楼都朝着上下相邻楼层相反的方向移动。
Viewed from the side, the pagoda seemed to be doing a snake dance—with each consecutive floor moving in the opposite direction to its neighbours above and below.
巨大的气球在上空上下浮动。
他觉得浑身上下都兴奋起来。
你应该能从上下文猜出这个词的含义。
You should be able to guess the meaning of the word from the context.
阅读能力强的人会利用上下文及推测来理解文意。
对一些消费者来说，从网上下载音乐简直是上天的恩赐。
Downloading music from the Internet has been manna from heaven for some consumers.
孩子的欢乐是无穷无尽的，汤姆的兴致也不相上下。
The child's delight was boundless; and Tom's not more moderate.
但是好的科学也需要对上下文的理解，清晰的解释和简洁的表达。
But good science also requires contextual understanding, clear explanation and concise presentation.
她走起路来头发上下晃动。
我身着新衣服，头理新发型—上下一身新。
球队的胜利使举国上下出现一派欢乐的场面。
The team's victory produced scenes of joy all over the country.
在中国，越来越多的人骑共享单车上下班。
In China more and more people ride shared bikes to and from work.
我教他如何使用互联网，如何在网上下棋。
I taught him how to use the Internet and how to play chess online.
这门课程真有趣！我等不及去上下一节课了。
What an interesting course it is! I can't wait to have the next class.
新的公共汽车装有空调，也很舒适，方便老人和残疾乘客上下车。
The new buses are air-conditioned, comfortable and easy for elderly and disabled passengers to get on and off.
这些蜥蜴很容易就完成了所有三项任务，与山雀在类似测试中的表现不相上下。
The lizards were able to manage all three tasks with ease, matching the performance of tits in similar tests.
到目前为止我只上过两次驾驶课，我的教练非常善解人意，所以我真的很喜欢上课。虽然课程很贵，但我已经迫不及待想要上下一次课了。
I've only had two driving lessons so far and my instructor is very understanding, so I'm really enjoying it and I can't wait for my next session although the lessons are rather expensive.
全家上上下下都很高兴。
举国上下团结一致。
—用步行上下楼梯来取代搭乘电梯。
多次上下舒展你的脚趾。
而上下颠倒的地图则展示了一个不同的世界。
德国队在上下半场各进两球。
德国队在上下半场各进两球。
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