"The only way to learn mathematics is to do mathematics."
The past is already written. The ink is dry.
Don't let anyone tell you that you can't do something.
成功的关键不仅在于个人技能，还在于团队的协作。
认证计划不仅仅是木制品上的贴纸；它们代表了对我们星球的承诺。
Look at a day when you are supremely satisfied at the end. It's not a day when you lounge around doing nothing; it's a day you've had everything to do and you've done it.
