Although he appears to maintain control in the midst of chaos, he actually crumbles under the weight of his own emotions and his regrets.

VOA: standard.2010.07.20

Well that process of control to maintain a constant environment inside our body, whether it's an environment of constant mass or constant composition, or constant temperature, is called homeostasis.

这个控制过程维持着,体内环境的恒定,不论是内环境中物质的量的稳定,或者成分的稳定,或温度的稳定,这种状态叫做内稳态

耶鲁公开课 - 生物医学工程探索课程节选

We need to find more creative ways to discipline our students and to maintain control in the classroom.

我们需要用更有创意的方法约束学生，维持课堂纪律。

反对体罚 - SpeakingMax英语口语达人

But the military government is set to maintain tight control over the vote amid calls by Burmese political activists for the international community to boycott the election result.

VOA: standard.2010.07.27

Failure to maintain tight control of glucose levels - by measuring blood sugar with a meter and compensating with doses of insulin - can result in serious health complications, including blindness, kidney failure and heart disease.

VOA: standard.2010.04.15