fore and-aft traction

例句：

1. 1. The ship'sengine provides fore and-aft traction to move forward.
   这艘船的引擎提供前向和后向牵引力以前进。
2. 2. The train's brakesystem uses fore and-afttraction to slow down.
   火车的制动系统使用前向和后向牵引力来减速。
3. 3. The aircraft's propellergenerates fore and-afttraction to lift off.
   飞机的螺旋桨产生前向和后向牵引力以起飞。