Excellent as DC-DC converter used in notebooks computers, PDA and mobile handphones. Step-up or step-down converters, flash memory.

绝佳的笔记型电脑、个人数位助理和行动电话中的直流-直流整流器，增压或降压整流器及快闪记忆体。

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I was literally walking up and down the stairs like an old lady, taking each step by step. I took about 1.5hrs just on the Great Wall and that covers only 4.5km of the entire 10km race!

当时我几乎像个老太太一样一步步地上下攀爬，全长10公里的赛程中，我花了一个半小时才完成了4.5公里。

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Switching power supply Switching power supply is a voltage conversion circuit, the main work is the step-up and step-down, are widely used in modern electronic products.

开关电源是一种电压转换电路，主要的工作内容是升压和降压，广泛应用于现代电子产品。

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The first step to insight is to ask questions like why do things fall down and not up?

起初的洞察力是问问题,为什么物体坠地而不是上升？

耶鲁公开课 - 心理学导论课程节选

And if you hear a triple, your step is this: down-up-up, down-up-up, down-up-up, down-up-up.

听到三拍子时,这样做,强,弱,弱

耶鲁公开课 - 聆听音乐课程节选

They filled in the octave up above and then they filled in the fifth and then they filled in the fourth and then they came down a whole step and then they went up a fourth from that whole step and then up a fourth from that, and they were filling in in this fashion.

他们填写了八度音程,然后填写了五度音程,又填写了四度音程,然后下降一个全音级,又从那个全音级上升四度音程,然后再上升四度音程,他们就是照这样填写

耶鲁公开课 - 聆听音乐课程节选

Take it one step further by nodding your head up and down.

WSJ: For the Love of Surfing and Wine Country

George spells out how this works, especially for professionals who are one step up from low-paying, low-skill jobs like cashiers and truck drivers, and one step down from the CEO level, which still involves face-to-face meetings and personal, rather than digital networking.

FORBES: Cover Story Spells Out Why You Must Be On LinkedIn

On the final flight, however, they got tangled up and he flew off her, bouncing down brutally step after step, while it was everything she could do to catch the bannister and not follow him.

NEWYORKER: The Valetudinarian