文学帮助我们理解人类的复杂性。

He allowed himself to be swayed by his conviction that human beings are not born once and for all on the day their mothers give birth to them, but that life obliges them over and over again to give birth to themselves.

The past is always tense, the future perfect.

理论计算机科学中的挑战不仅仅是解决问题，而是理解问题解决的本质。

Energy security is a crucial guarantee for national development. We must intensify technological innovation to enhance the efficiency of oil and gas exploration and production.

和平时期流汗越多，战争时期流血越少。