1. The two astronauts also managed to enjoy themselves on the spacewalk which lasted an hour longer than normal because of glitches with tethers.
2. tethers什么意思
2. If nothing works, the jammed platform will simply be tied down with sturdier tethers.
3. tethers是什么意思
3. If that didn't work, the jammed platform was simply to be tied down with sturdier tethers.