In other words, ultrasound essentially travels in a very narrow beam — this makes it great for focusing the waves toward a desired area, but not for actual aural comprehension.
换言之，基本上超声波的传播声束极窄，这非常有利于将声波集中至指定地点，但对实际听力则无所助益。
You will practice aural comprehension and strengthen your oral communicative competence in various modes of discussion and everyday conversation.
你将练习听力理解，强化在各种讨论形式和日常交谈中的口语沟通能力。
Listening is the most essential aspect in language communication, because of which the teaching of aural comprehension plays an extremely important part in English teaching.
听是人类进行语言交际最初始、最基本的环节，因此，听力教学在英语教学中占有很重要的地位。
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