She has an unbounded capacity to imitate and adopt the new.她有模仿和接受新事物的无限能力。

His advice was always sensible and his energy unbounded.他的建议总是很明智, 他的精力似乎永远也用不完。

The ground crew had gone from unbounded enthusiasm to bored waiting.地勤人员的无限热情已经转变为无聊的等待。