过去是一个陌生的国度;那里的人们行事方式不同。
If you skillfully follow the multidisciplinary path, you will never wish to come back.It would be like cutting off your hands.
The health of our oceans is directly tied to the health of our planet - and ultimately, to human health.
动力学的方程在用变分法的语言表达时是完全的。
Economic inequality is not just a moral issue; it’s an economic one as well.