Attention is the taking possession by the mind, in clear and vivid form, of one out of what seem several simultaneously possible objects or trains of thought.

The best way to get a project done faster is to start sooner.

如果物体处于静止状态或作匀速直线运动，只要没有外力作用，物体将保持静止状态或匀速直线运动状态。

明智而有德行的人在任何时候都愿意为了自己特定阶层或社会的公共利益而牺牲自己的私人利益。