Heavier traffic meant a slower police response and more cars to vanish among.

交通拥挤意味着警察反应速度较慢，有更多的汽车可以做掩护。

And that will, hopefully, mean a better response.

希望这将意味着更好的回应。

The neurologist knows that the mean response time for rats not injected with the drug is 1.2 seconds.

神经学家知道，未注射药物的大鼠的平均反应时间为 1.2 秒。

I'd usually do it towards the end of the day, when traffic was heavier. Heavier traffic meant a slower police response and more cars to vanish among.

我通常会在晚上实施抢劫，那时交通比较拥挤。”交通拥挤意味着警察反应速度较慢，有更多的汽车可以做掩护。

So that's essentially saying it has no effect, because we know that if you don't give the drug the mean response time is 1.2 seconds.

所以这基本上是说它没有效果，因为我们知道如果你不给药物，平均反应时间是 1.2 秒。

Or that the mean with the drug-- the mean, and maybe I could say the mean with the drug-- is still going to be 1.2 seconds, our mean response time.

或者药物的平均值— — 也许我可以说药物的平均值— —仍然是 1. 2 秒， 我们的平均响应时间。