It has four start mode: the ramp voltage start, the limit current start, the ramp speed start and the discrete frequency start.

所研究的软起动器具备四种起动方式：电压斜坡起动、限流起动、转速斜坡起动和分级变频起动。

youdao

Too often, when people start dieting, they increase their workout frequency beyond what they normally do.

经常地，当人们开始节食的时候，他们增加了训练的频率，而且远超过了平时的水平。

youdao

Inactive people should start with small amounts of physical activity and gradually increase duration, frequency and intensity over time.

缺乏活动的人在开始时应做少量的身体活动，并随时间逐步增加活动时间、频率和强度。

youdao

So, if we start instead with talking about the energy levels, we can relate these to frequency, because we already said that frequency is related to, or it's equal to the initial energy level here minus the final energy level there over Planck's constant to get us to frequency.

如果我们从讨论能级开始，我们可以联系到频率上,因为我们说过频率和能量相关,或者说等于初始能量,减去末态能量除以普朗克常数。

麻省理工公开课 - 化学原理课程节选

So this is our final equation, and this is actually called the Balmer series, which was named after Balmer, and this tells us the frequency of any of the lights where we start with an electron in some higher energy level and we drop down to an n final that's equal to 2.

把2代入到这里，所以得到1除以,这就是我们最终的方程，这叫做Balmer系，以Balmer名字命名的,它告诉我们从高能级掉到n等于2的,最终能级所发出光的频率。

麻省理工公开课 - 化学原理课程节选

As the variations or short-term disturbances in frequency increase, electronic devices start to malfunction, experience reduced performance and, in extreme cases, suffer permanent damage.

FORBES: Perfect Power: Clean Energy's Killer App

The engineers found a way to kick-start a radio-frequency device wirelessly using an external power source initially, but running the device afterward on the output of power generated by the inner ear.

WSJ: Harnessing Energy From the Body to Power Devices

They can start by making markets coordinate and making high-frequency traders maintain orderly markets.

FORBES: Flash Crash: The Regulators Did It