Staying calm was an exercise in self-control.

保持镇定是一种自我控制活动。

《牛津词典》

Your self-control "muscle" is just like the other muscles in your body — when it doesn't get much exercise, it becomes weaker over time.

你的自我控制“肌肉”就像你身体的其他肌肉一样——当它没有得到大量锻炼的时候，它会随着时间变弱。

youdao

Well, try to exercise a bit of self-control would be the first thing.

那么首先就要锻炼一下自己的自控能力。

youdao

The reform of politics may not be within our power but the exercise of self-control always is.

政治改革,也许并非我们能力所及,但自控的练习却永远是想要参与政治改革的个体。

耶鲁公开课 - 政治哲学导论课程节选

Moussavi has called on Iranians to "exercise self-control, " while still supporting their right to demonstrate.

CNN: Iran slams 'meddling West' over election

Mr Mansell said the prosecution did not accept that Mr Wilkinson's medical conditions affected his ability to exercise self-control.

BBC: Ex-soldier denies Leeds landlady murder

Farrow had been diagnosed with a psychopathic personality disorder and his barrister argued it "substantially affected" his ability to exercise self-control.

BBC: Stephen Farrow