She was jealous, humiliated, and emotionally at the end of her tether.
她觉得又嫉妒又屈辱，情绪低落至极。
《柯林斯英汉双解大词典》
2
I knew what it meant: The handrail could be completely pulled off and the safety tether might break, and I might therefore be pushed into space.
我知道这意味着什么：扶手可能会被完全扯下来，安全绳可能会断裂，我可能因此被推到太空中去。
3
Once you are in this geostationary orbit right over the tower, just lower your carbon nanotube cable down from the satellite, tether it to the tower here on Earth.