Instead, petrol cars became more popular because they could travel longer distances without stopping.
相反，汽油车变得更受欢迎，因为它们可以在不停车的情况下行驶更远的距离。
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But it's these ample fat reserves that allow the birds to fly such long distances without stopping, said study leader Raymond Klaassen, a biologist at Sweden's Lund University.
Since this USES a 2.5 second reaction time and braking friction of 0.29, initial distances outside this range should almost always result in stopping before collision.