灯光熄灭了，一时间游客的噪声从短暂的抗议的抱怨声变成了贪婪的咆哮声，接着变成了失望的低语声。

The lights go off, and the din of the tourists turns from a momentary grumble of protest to a greedy growl to whispered disappointment.

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随着时间的积累，咆哮体将逐渐变成一种难以摆脱的习惯和主流；

With time going by, it will gradually become a habit, a mainstream, which can’t be got rid of;

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给力的尼亚加拉瀑布倾斜在尼亚加拉悬崖上，声音如雷声咆哮…是的，大多数时间是这样的，但不总是。

Mighty Niagara Falls, pouring over the Niagara Escarpment to the sound of rolling thunder... most of the time, yes, but not always.

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