1. The roar of the train reverberated in the tunnel.
    火车的轰隆声在隧道里回荡.

2. The noise of the taxi and the city united into a deep roar.
    出租车的噪声和这城市的喧闹声组成了低沉的轰鸣声。

3. Then at last the miracle happened for which his unconscious mind had been seeking for so long. Falling into a sleeplike condition, he suddenly felt as though he were sinking in a mighty flood of water, and the rush and roar soon took musical shape wi
    终于，他的潜意识长期以来一直在寻找的奇迹发生了。他进入了似睡非睡的朦胧状态，骤然间感觉到自己仿佛掉进了滔滔洪水之中,不断在下沉，很快，洪水的冲击声和咆哮声以音乐的形式呈现在他的脑海里。

4. At near the speed of sound, we were flying ahead of our engine's roar.
    由于速度几近音速，我们把引擎的轰鸣声甩在了后面，

5. I struggled uselessly to respond to the instructions of my coach, who was shouting above the roar of the fan to tell me how to ride the wind funnel up and down, left and right, by bending various limbs.
    教练的喊声盖过风扇的轰鸣，告诉我如何屈折各肢体来乘着风柱上下左右地飘动，我照着他说的毫无结果地折腾了一番。