continuous

continual, continuous, successive, constant, persistent

这些形容词均有“连续的”、“不断的”之意。
continual: 强调重复或持续发生，但连续之间允许有间断。
continuous: 语意最强，强调在时间和空间上没有间断。
successive: 强调事物一个接一个地发生，无间断。
constant: 多指习惯性的重复和不变的持续。
persistent: 普通用词，可指不懈的努力，也可指任何连续不断或重复出现的事物。

形容词 continuous:

1. continuing in time or space without interruption
   同义词：uninterrupted
2. of a function or curve; extending without break or irregularity

1. The patient is seriously ill and is being kept under continuous observation.
   病人病情严重，现接受持续观察。
2. We had twelve hours of sunshine yesterday, as against a forecast of continuous rain.
   昨日有十二小时的晴天，预报却说仍有雨。
3. Continuous assessment is made of all students' work.
   对全体学生的功课作出连贯性的评定。
4. Listening to his continuous stream of empty chatter really tested my patience.
   听他那没完没了的连篇空话对我的耐心真是一大考验。
5. The brain needs a continuous supply of blood.
   大脑需要连续不断地供血。