During stages three and four (often called "deep sleep") , it is very hard to wake up a person.

在第三和第四阶段（通常称为“深度睡眠”），这时唤醒一个人是很难的。

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It made a “flea hop, ” as the team called it, back in December when it lifted about three feet off the runway and flew less than a quarter mile.

去年十二月份试飞的时候，它只被抬升到了跑道上方三英尺的高度，总共飞了还不到四分之一英里，用研发人员的话来说，它只是完成了一趟“跳蚤蹦”。

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With three dimensions, you can see why it is called a cube.

使用三个维度，您就会明白为什么要将其称为多维数据集。

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The eighty-three kilogram satellite, called Sputnik, had two radios that sent signals as it circled the world.

VOA: special.2009.06.10

They're derived from a precursor called triacylglyceride, which is as glycerol molecule with three fatty acid chains dangling off of it.

它们来源于一种叫三酰甘油的前体,由甘油分子上连接了,三个脂肪酸链构成

耶鲁公开课 - 生物医学工程探索课程节选

Nano hello c We did Nano for hello.c or whatever I called it, GCC to actually compile into 0s and 1, and then step three is to actually run it.

首先，第二，GCC，hello，c把它编译成01二进制文件，第三，运行。

哈佛公开课 - 计算机科学课程节选

We called it the Trauma Response Database and over three months we registered more than 2, 000 licensed professionals.

FORBES: If You Don't Take Time To Remember, You Forget

Pitt dated Gwyneth Paltrow for three years and then called it off almost as soon as they got engaged.

FORBES: Why Brad and Angelina Shouldn't Get Married

To be called the Preserve, it is a par-three course with only 13 holes.

WSJ: Cabot Links, Streamsong, Bandon: When Building a Course Makes Sense | Golf Journal by John Paul Newport