The more you know who you are, and what you want, the less you let things upset you.

物体的加速度与所受的合外力成正比，与物体的质量成反比。加速度的方向与合力的方向相同。

The future of energy lies in the balance between traditional and renewable sources.

数学的美在于它能够以最抽象的术语描述宇宙。