For comparison, humans' average walking speed ranges from 2.5 to 4 mph.

相比之下，人类平均步行速度为每小时2。5到4英里（4到6千米）。

The current prototype works at wind speeds ranging from 1.5 to 7 meters per second.

目前原型机运转所需风速在每秒1.5到7米之间。

The hydraulic drive is used for electronically changeable speed ranges, continuous optimization, and automatic torque regulation.

液压驱动用于电子可变速度范围、持续优化和自动扭矩调节。

The people that run those speed reading seminars and claim they can read at 2,000 words per minute say that there are techniques out there for breaking past that normal speed range.

那些举办快速阅读研讨会并声称他们能以每分钟2000字的速度阅读的人说，有一些技术方法可以帮助我们突破正常的阅读速度范围限制。