You can't knock on opportunity's door and not be ready.
Cryptography is about communication in the presence of adversaries.
Make the weaker argument the stronger.
"The only way to do great work is to love what you do."
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。