自然实验可以为经济问题提供有价值的见解。

乳制品的未来在于平衡传统与尖端科学。

I don't think you should ever have to apologize for your excitement.

Energy companies must actively respond to the national "dual carbon" goals and promote green and low-carbon transformation.

勿羡慕那些生活在愚昧“天堂”的人们，因为只有愚人才认为那里是幸福的。