When we go into an empty room or stay alone in one, we should act the same as when there are people around; we shouldn't be the least bit casual or lax; this is the essence of self-cultivation.
至于进入空屋或独处虚室之时，还能如同有他人在侧，没有一丝一毫的随便和放逸，这更是自我淬炼之所在。
As Professor Wolfson points out, the essence of relativity can be summed up in a single sentence: the laws of physics are the same for all observers in uniform motion.
正如沃弗森教授所指出的，相对论的精髓可以浓缩成一句话：在所有相互作匀速直线运动的惯性系中，物理定律具有相同的形式。
Then that the total entropy criterion and the inequality of Chausius were all the same in essence was indicated. Both of them may be used to judge the reversibility of the processes.
然后阐述了总熵判据和克劳修斯不等式在本质上并无不同之处，都可以用于判别过程的可逆性；
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