For your average bottom fishing, you generally do not need 2 speed reels.

对于一般的底拖网捕捞，通常并不需要2个速度卷轴。

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The population within these developing countries is now increasing at average growth rate of 2% annually, and the growing speed will last to the mid of next century.

这些国家的人口目前正以年均近2％的速度增长，而且预计这种增长速度将保持到下个世纪中页。

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It came in third place with an average speed of 2.17 Mbps for Netflix streams.

FORBES: Netflix Ranks Google Fiber as the Fastest ISP

The car or truck is driven for 11 miles and makes 23 stops over the course of 31.2 minutes, with an average speed of 21.2 mph and a top speed of 56 mph.

FORBES: Inside The EPA's Fuel Economy Ratings (And Why They Remain An Elegant Fiction)

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)