He was an experienced parachutist who had done over 150 jumps.他是个经验丰富的跳伞者，已经跳过150多次伞了。A daredevil parachutist jumped from the top of Tower Bridge today.一位大胆鲁莽的跳伞者今天从伦敦塔桥的桥顶跳了下去。The parachutist floated gently down to eart...
The bridge and the top of the bus was only ten clearances.桥与公共汽车车顶之间的间隙只有十厘米.When noise and vibration must be restricted, lower clearances are necessary.当噪音和振动,必须加以限制, 降低许可是必要的.Paper - drying machines that operate under ...