The essence of cryptography is to allow communication in the presence of adversaries.

这个世界是个美丽的地方，值得为之奋斗。

我认为你不应该觉得自己已经取得了一切成就。

I don't want to be a product of my environment. I want my environment to be a product of me.

下定决心，果断行动，并承担后果；犹豫不决在这世上成就不了任何事。

Coal companies must fulfill their social responsibilities while pursuing economic benefits.