We are cruising along at 30 mph when, suddenly, the car flies up in the air and lands with a dull thump.

我们正以每小时30英里的速度行驶，突然，汽车腾空而起，砰的一声重重地落在地上。

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All fifteen boys pick up their textbooks and thump their diminutive desks as they yell out each letter in unison.

十五个男孩都拿起他们的课本，边敲着小课桌，边整齐大声地读出每一个字母。

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When he had travelled a few minutes it would begin a remorseless thump, thump, thump, and then leap up and away in a painful flutter of beats that choked him and made him go faint and dizzy.

每走几分钟，它就会怦、怦、怦地狂跳不止，然后还要演变成一阵持续的、痛苦的上窜下跳的撞击，几乎让他窒息了，令他感到虚弱而眩晕。

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