英语语法分析

I listened to the thwack of the metal balls.

我听着金属球相撞的声音。

《柯林斯英汉双解大词典》

Then the woodcutter let his axe fly – Thwack! Everyone heard it.

然后那个伐木工脱手甩出了斧头。哐！的一声，每个人都听见了。

《柯林斯英汉双解大词典》

If you rap it with your knuckle, you hear the thwack of gypsum rather than the ring of cold metal.

如果用指关节击之，你能听见石膏的闷响，而非冷冰冰的金属发出的鸣响。