边界是地球脸上的伤疤,是暴力和分裂的标记。
The true measure of success is not just profit, but the positive impact we leave on society.
模形式的算术是理解数论更深奥谜团的关键。
If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.
Investing in cleaner coal technologies is investing in our planet's future.