物理Don’t stop when you’re tired. Stop when you’re done.

老师You don’t have to be great to start, but you have to start to be great.做科You don’t have to be great to start, but you have to start to be great.

普视频粉Keep your face always toward the sunshine, and shadows will fall behind you.丝超Believe you can and you're halfway there.千万Believe you can and you're halfway there.

物理Your limitation—it’s only your imagination.老师Don't wait. The time will never be just right.

做科Believe in yourself and all that you are. Know that there is something inside you that is greater than any obstacle.

普视频粉Do something today that your future self will thank you for.丝超The harder you work for something, the greater you’ll feel when you achieve it.

千万Push yourself, because no one else is going to do it for you.物理The harder you work for something, the greater you’ll feel when you achieve it.

老师Great things never come from comfort zones.做科It’s going to be hard, but hard does not mean impossible.

(责任编辑：潘长江)