But this wind carried no threat of storm; already he could sense the difference.

但这风没有带来暴风雨的威胁；他已经能感觉到不同了。

We can sense differences in weight of just 2% and we can detect differences in sound frequencies of less that one half of a percent.

我们可以感觉到只有 2% 的重量差异，我们可以检测到不到 0.5% 的声音频率差异。