towline

n.拖绳；拖链

We present a design concept for a spacecraft that can controllably alter the trajectory of an Earth-threatening asteroid by using gravity as a towline. 我们为一艘太空船提供了一项设计，能藉由使用万有引力如一个拖绳般约束改变威胁地球的小行星的轨道。

Towline imported from Germany. 德国进口拖链。