It will, however, travel between the two cities at less than full tilt, at an average speed of 350 km per hour.

然而，当在上述两个城市之间运行时，它不会满负荷工作，而是会把时速控制在平均350公里每小时。

youdao

At an average speed of about 67,000 miles per hour. Again, not talking about the drive home last night.

以平均每小时67 000英里的速度，再说一次，不是说你昨晚开车回家。

youdao

For the city test, the cars are driven on an 11-mile, stop-and-go journey at an average speed of 20 miles per hour that lasts 31 minutes and includes 23 stops.

FORBES: Fuel Economy Sticker Shock

The EPA's traditional highway test is conducted at an average speed of 48.3 miles per hour and a top speed of 60.

WSJ: Why Your Mileage May Not Measure Up

From a research station operated by the National Science Foundation called Summit Camp, a spot where the ice sheet is about 2 miles thick, GROVER will crawl at an average speed of 1.2 mph (2 kilometers per hour).

ENGADGET: NASA's GROVER eco-rover to examine Greenland's ice sheet (video)