我可以清楚地看到他将头向右转然后又向左转。
I could plainly see him turning his head to the right and left.
但是,他们计算出通过一个城市的路线,始终尽可能多地向右转,即使这条路线会多远一点儿,因为这样做是最快的。
But they worked out that to take a route through a city, always take as many right turns as possible, even if the route is a bit longer, because that's going to be quickest.
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