Conservation of time, energy, and focus are his hallmarks.
节约时间、精力充沛和专心致志是他的突出特点。
On the other hand, were time symmetry to break down, conservation of energy would fail.
另一方面，如果时间对称性被破坏/不再成立，能量守恒就也随之不再成立。
And so now I can apply, for the first time, the conservation of momentum.
我可以第一次应用，动量守恒。
And so now I can apply, for the first time, the conservation of momentum.
我可以第一次应用，动量守恒。
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