Life would be too smooth if it had no rubs in it.
煤炭开采的创新不仅仅是技术问题，更是思维方式的转变。
I don't know what's better gettin' laid or gettin' paid.
The ocean is not just a resource; it's a responsibility.
教学的全部艺术，不过是唤醒年轻人天生的好奇心，以便日后满足它。
我所有的作品都源于对人类状况的挫败感。
自然实验可以为经济问题提供有价值的见解。