Never give up. Today is hard, tomorrow will be worse, but the day after tomorrow will be sunshine.
永不放弃。今天很艰难,明天会更糟,但后天会阳光灿烂。
The selfish gene theory is not a theory about selfishness in the everyday sense. It is a theory about the evolution of behavior.
我一直在不停地努力,不嘲笑、不哀叹、不嘲笑人类的行为,而是理解它们。