We are seated in one of the trains, and with us we have a special speedometer that measures their relative speed.

我们坐在其中的一列火车上带着特制的速度测量仪，可以测出两列火车之间的相对速度。

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This exercise gives coaches a good indication of each oarsman’s boat-moving ability—and of the relative speed of combinations of rowers.

通过这个过程，教练可以大体得知船员的划船能力以及和其他组员组合后的相对速度。

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The size of the arrows indicates the relative speed of plate motion.

箭头的大小代表了相应的板块移动速度。

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In hedge funds, he sees a growing interest in relative speed.

FORBES: Firms Look to Event Driven Trading for Greater Alpha

The Peugeot No.9 was leading when the rain started in the 14th hour, offering an opportunity for the Audi cars to make up for their relative lack of speed in dry conditions.

BBC: Le Mans glory for Audi and McNish

Other passengers say it's a reliable and comfortable service but those with experience of European trains say the American ones are a pale reflection - in terms of frequency, speed and relative luxury.

BBC: Could the US crack high-speed rail?