Stepper motors are used widely in numeral control system with the characteristics of high speed starting and stopping, accurate stepping, directly receiving numeral quantity.

步进电机因其快速启停、精确步进、直接接受数字量等优点，在数控系统中得到广泛应用。

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Starting this month, the new Xi'an Chengdu high speed railway will shorten this travel time to three hours.

从这个月开始，新的西安成都高铁将把旅行时间缩短到3个小时。

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But blood drops with long tails can tell a great deal about the direction, speed and angle of the blood's starting point.

VOA: special.2010.05.05

This is the starting speed, that's the rate at which it is gaining velocity, and that's how long it's been gaining it.

这是起始时的速度,这是速度的增长速率,这是加速的时间

耶鲁公开课 - 基础物理课程节选

Starting out as a technical skier, Whiteface also gave Weibrecht the chance to gradually increase his speed.

VOA: standard.2010.02.09

By comparison the high-speed internet access BT is starting to roll out only runs at 512 kilobits per second.

BBC: sky shot

Because it is far more efficient to unwind the spring at a constant speed, rather than stopping and starting it, this provides enough energy to run the radio for an hour.

ECONOMIST: MONITOR

Meantime, local phone companies are starting to sell high-speed Internet access through digital subscriber lines.

FORBES: All Over the Map