减少教室里德吵闹声。
It's noisy. But these people are finding ways to make their lives better.
但这里的人们想法设法让生活更好些。
They can make streets more beautiful and less noisy.
它们能够使街道变得更加漂亮并且减少噪音。
The crowded and noisy city always make me low-spirited.
拥挤、喧闹的城市总让我感到情绪低落。
They make streets more beautiful and less noisy, but what else can they do?
它们能使街道更加美丽，减少噪音，但是除此之外它们还能有什么作用呢？
The noisy children always make me angry.
吵闹的孩子们总是让我生气。
But usually, when you make a harder sound, it's less noisy.
但是通常来说，当你要演奏一个比较硬的声音时，噪音会比较小。
But usually, when you make a harder sound, it's less noisy.
但是通常来说，当你要演奏一个比较硬的声音时，噪音会比较小。
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