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。
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。
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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