The only way to do great work is to love what you do.
世界是事实的总和,而非事物的总和。
The thing you fear most has no po you free.
What we know is not much. What we do not know is immense.
The only limits you have are the ones you set for yourself.
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。