His average speed had been 301 miles per hour.

他的平均时速实际是301英里。

The raft traveled at an average speed of four knots.

筏子航行时平均时速4海里。

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

在比赛开始时他以中速赛跑。

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？

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。