教师的最大幸福就是把一群群孩子送往理想的彼岸。

数学是逻辑思想的诗歌。

心有其理，理性难明。

Economics is the study of how societies use scarce resources to produce valuable goods and services and distribute them among different individuals. If we think about the definitions, we find two key ideas that run through all of economics:

我创作的每一首歌都是我的心血。

能源转型从负责任的资源开采开始。