For those going away to study or work in an English environment, they have to learn to listen, because they need to know what is bouncing back to them so as to reply.

对那些要出去在英语环境中学习或工作的人来说，他们就得学会听，因为他们得明白别人说了什么才可以做出反应。

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Birds, for example, are said to be able to hear low frequency sounds bouncing off mountains hundreds of kilometres away.

以鸟儿为例，据说它们能够听到来自千里之外的山谷里的低频回声。

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Many of these neutrons collide with more atoms on the surface before bouncing away into space.

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Celtic continued to look more potent in the second half and in the 50th minute Combe pulled off a great point-blank save from the head of Vennegoor of Hesselink after Maloney had floated in a tantalising cross, defender Simon Ford completing the clearance by knocking the bouncing ball away from the line.

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Among the bright memories the audience will take away are vivid images of marching bakers and bouncing chimpanzees, and the brilliant humor of David Ives.

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