This moment is all that we have.
当下是我们所拥有的一切。
Take this moment to remember that the future hasn't happened, the past is gone and the present, the wonderful present, is all we have and all that is guaranteed.
用这一刻记住未来的事还并未发生，过去已经过去而现在，美好的现在，是我们拥有的全部，是我们能够保证的全部。
And so all we have to do now is to calculate the moment of inertia of the system, and then we can predict what the period — of this pendulum is going to be — which is not my goal.
所以我们现在要做的，是算出这个系统里的转动惯量，然后就可以预测出，这个摆的周期是多少-，这并不是我的目的。
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