A book should feel like a friend to a child—comforting, exciting, and full of surprises.
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。
世界会打碎每个人,之后,许多人在破碎的地方变得坚强。
Our industry has the expertise and scale to be part of the climate solution.