The best time to plant a tree was 20 years ago. The second best time is now.
Stop being afraid of what could go wrong and think of what could go right.
Books are bridges—between people, places, and times.
The future of the automobile industry is electric, and we are committed to leading this transformation.
代数是人类创造的一种智力工具，用于清晰地表达世界的数量关系。