Thomas Jefferson is often credited with saying that The price of liberty is eternal vigilance.

托马斯·杰斐逊有一句话经常为人所称赞，自由的代价是永恒的警觉。

The response to those states must be constant vigilance.

应对这些国家必须要始终保持警惕。

Living like a hermit without a companion requires constant vigilance.

因为独自隐居，没有同伴照应，它需要时刻保持警惕。

Now, that's the precision of their methods, but there's also the vigilance.

而现在来谈谈这些方法的准确性，但同时也包含了警觉性。

Norepinephrine has substantial effects on focus, attention, vigilance and it improves mood.

去甲肾上腺素对人的专注度、注意力和警觉性都有显著影响，而且可以改善情绪。

However, the impressive part is the vigilance and precision in which Disney carries out these methods.

然而令人印象深刻的是，迪士尼乐园使用这些方法的警觉性和准确性。

The answer is vigilance and light.

唯有以警惕和放松来应对。

Constant vigilance is necessary in order to avoid accidents.

为了避免意外事故， 必须经常保持警惕。

Vigilance keeps changing the way they communicate.

" 时刻警惕" 一直更换通信方式。

Vigilance is necessary if you want to beat the odds.

如果你想打破常规，必须保持警惕。