The wagon kept on jolting, the canvas top snapped in the wind.

马车继续颠簸，帆布顶篷在风中折断。

Pa hung his gun to the wagon bows inside the canvas top, where he could reach it quickly from the seat.

爸爸把他的枪挂在帆布车顶内的马车车头上，他可以从座位上快速够到。