Waves of light, whether they be waves in the ether or other waves, are in all cases periodic processes in time.
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。
Every tree planted today is a legacy for tomorrow's generations.
The more determinedly I exist, as myself, within the conditions of the time, the more clearly I shall hear the voice of the eternal.
时间不是线性的，而是一张相互交织的时刻之网，过去、现在和未来共存其中。