n.系繩；系鏈；界限；（能力、財力、忍耐等的）極限

v.練栓；拘束

The astronauts walked in outer space without a tether. 宇航員在沒有系繩的情況下進行太空行走。

This group is composed of men who had never associated themselves with rickshaws but were forced to take up the trade, because they have reached the end of their tether. 這一些是以前決沒想到自己能與洋車發(fā)生關系，而到了生和死的界限已經(jīng)不甚分明，才抄起車把來的。