v.指弹( thrum的过去式和过去分词 );敲打;乱弹;轻敲;
例句:
The air-conditioner thrummed.
空调嗡嗡作响。
He had thrummed upon this topic till it is threadbare.
他对这个问题一再发言已使它成为陈词滥调.
The telegraph wires thrummed, thrummed, thrummed above them.
电线在他们头上呜呜地响个不停.