The training and improvement of labor are effective ways to increase productivity.
大自然倾向于在她所有的作品中产生恒常性,但并不总是成功。
幸福是最近两年里听到最多的词语。幸福不单只是和个人经历和价值相关,它也同样关系到我们的环境。
Success does not consist in never making mistakes but in never making the same one a second time.