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光波,无论是以太波还是其他波,在所有情况下都是时间上的周期性过程。
The past is not dead, it is not even past.
The individual has become a mere cog in an enormous organization of things and powers which tear from his hands all progress, spirituality, and value in order to transform them from their subjective form into the form of a purely objective life.
If liberty means anything at all, it means the right to tell people what they do not want to hear.
The more you give, the more you receive.