perpetual
US
UK perpetual adj: (continuing, indefinite)
SC 永久的 yǒng jiǔ de
SC 不间断的 yǒng jiǔ de ，bú jiàn duàn de
TC 不間斷的
TC 不間斷的
Cindy's perpetual whining about her job is getting annoying.
perpetual motion n: (continual movement)
SC 永动 yǒng dòng
Very few objects can remain in perpetual motion.