1. The wheels scooped up stones which hammered ominously under the car.
    车轮搅起的石块，在车身下发出不吉祥的锤击声。

2. The wheels scooped up stones which hammered ominously under the car.
    车轮搅起的石块锤击车身，发出不祥的锤击声。

3. On September 7, 1940, nearly four hundred German bombers hammered the city with bombs in broad daylight.
    1940年9月7日，近400架德国轰炸机在大白天用炸弹猛烈轰炸了这座城市。