Modules participate in a dynamic life cycle which includes the ability to add, update and remove modules at runtime, whilst preserving the state in the system.
As you lower your pen whilst continuing the motion, you should notice the resulting shape is more regular than it otherwise would have been.
随着你降低你的笔，同时保持圆周运动，你应该会注意到画出的形状比起不这样做画出的形状要规范的多。
He was at his happiest whilst playing cricket.
玩板球时他最开心了。
Indeed, it is important to keep fit and healthy, whilst we all aspire to improve the way we look and feel in order to make good first and lasting impressions.
