Heidi, climbing on a chair, took down the dusty book from a shelf.
海蒂爬上一把椅子，从书架上取下那本满是灰尘的书。
The policeman is climbing down the tall building to save the child.
一个警察正从大楼上爬下来去救那个孩子。
Half-way up the mountain we met another party of people climbing down.
上山的中途我们遇见另一群正在下山的人。
After climbing to the hill top, I sat down to catch my breath.
爬到山顶之后我坐下来歇一口气。
小心，爬下来。
Before kids are safe climbing up, they need to learn how to climb down.
孩子必须先学习如何爬下，才能安全地爬上。
The boy is climbing up and down the ladder.
这男孩在梯子上爬上爬下的。
When you reach the top of a mountain, the worst part is climbing down.
当你爬上山顶以后，下山就是最困难的事了。
When you reach the top of a mountain, the worst part is climbing down.
当你爬上山顶以后，下山就是最困难的事了。
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