They draw their energy from sunlight (the reflected light exerts a small pressure on the sail, driving it forward) and therefore need no fuel.

它们利用太阳光获取能量(反射的阳光施加小量压力与太阳帆上，进而驱动其前进)，因而无需燃料。

youdao

The Boston University Bridge (on Commonwealth Avenue, Boston, Massachusetts) is the only place in the world where a boat can sail under a train driving under a car driving under an airplane.

波士顿大学大桥(马萨诸塞州波士顿联邦大道)是世界上唯一一个船只能航行在行驶的火车和正驾驶的汽车和飞机的地方。

youdao