You have to be willing to suffer to achieve something great.
在我们迈向低碳未来的过程中,天然气将在能源结构中发挥关键作用。
The act of writing is an act of courage.
自然实验可以为经济问题提供有价值的见解。
Marxian Socialism must always remain a portent to the historians of Opinion — how a doctrine so illogical and so dull can have exercised so powerful and enduring an influence over the minds of men, and, through them, the events of history.