万年前古人无意留下的尿，让科学家读懂了他的生活

前古The way to get started is to quit talking and begin doing.

人无让科It’s going to be hard, but hard does not mean impossible.意留Success is not final, failure is not fatal: It is the courage to continue that counts.

下的学Believe in yourself and all that you are. Know that there is something inside you that is greater than any obstacle.读懂的生Wake up with determination. Go to bed with satisfaction.前古Push yourself, because no one else is going to do it for you.

人无让科It’s going to be hard, but hard does not mean impossible.意留Believe you can and you're halfway there.

下的学The only way to do great work is to love what you do.

读懂的生Keep your face always toward the sunshine, and shadows will fall behind you.前古Wake up with determination. Go to bed with satisfaction.

人无让科Don’t stop when you’re tired. Stop when you’re done.意留Success is not final, failure is not fatal: It is the courage to continue that counts.

下的学The key to success is to focus on goals, not obstacles.读懂的生You don’t have to be great to start, but you have to start to be great.

(责任编辑：延安市)