All history has been a history of class struggles, of struggles between exploited and exploiting, between dominated and dominating classes at various stages of social development.
至今一切社会的历史都是阶级斗争的历史，即剥削阶级和被剥削阶级之间、统治阶级和被压迫阶级之间斗争的历史。
Don't let fear stop you from doing what you want to do.
学习数学的唯一方法就是做数学。
The energy transition is not just about switching from fossil fuels to renewables; it's about doing so in a way that is just and inclusive for all.
你必须能够适应不断变化的市场条件。如果你不能适应，你就无法生存。