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1·The average speed for errors was 4 meters per second.

产生误差的平均速度是每秒4米。

2·Some studies suggest that straight, horizontal bars painted across roads can initially cut the average speed of drivers in half.

有研究表明，在道路上画上笔直的横杆，可以在开始将司机的平均速度降低一半。

3·On two separate morning visits to the scientists' lab, each man walked for an hour at an average speed that, in theory, should allow his body to rely mainly on fat for fuel.

在科学家的实验室里，每个人分别在上午的两次访问中，以平均速度走了一个小时，理论上，他的身体应该主要依靠脂肪作为燃料。

4·They could walk at an average speed.

他们可以匀速行走。

5·The raft traveled at an average speed of four knots.

筏子航行时平均时速4海里。

6·He ran at an average speed at the beginning of the race.

在比赛开始时他以中速赛跑。

7·Which bar chart represents the average speed of the vehicles?

哪个条形统计图代表这些交通工具的速度？

8·The train's average speed was no better than that of our bicycles.

火车的平均速度比我们骑自行车的速度快不了多少。

9·The Marathoner ran at an average speed at the beginning of the race.

那位马拉松运动员开始时以中速赛跑。

10·And I will show you now what is the average speed between time zero and four.

现在我要给你们看的是，0到4秒间的，平均速率。