dy x dt That tells us dx is x prime of t dt.

是y’dt，dy，becomes，y，prime，of，t，dt。,是x，So，，we，know，x，is，x，of，t。,它告诉我们dx是x

youdao

Buskirk says the X-47B is expected to play an integral role in future us operations in Asia.

布斯·科克称x - 47b对于未来美国对亚洲地区的行动起着非常完整的作用。

youdao

We can write out what it is for any certain atom or ion x, X so it's just x plus an electron gives us x minus.

我们可以用，X，来表示一个任意的原子或离子，因此可以写成，X，加一个电子等于负一价的。

youdao

And x-ray diffraction allows us to characterize solid matter.

让我们可以用来,表征固态物质。

麻省理工公开课 - 固态化学导论课程节选

Funny story, I met him because at MIT they signed us all up for chest x-rays alphabetically-- that's the way MIT does things, an orderly way.

有趣的是,我在MIT遇到他是因为,我们按姓氏字母顺序,排队去照胸透,MIT做事总是用这种有条理的方式

耶鲁公开课 - 金融市场课程节选

This jiving - and I should say X-rated story - stays with us.

NPR: Book Review: 'Our Man In Iraq'

Transportation Security Administration agents at airports use x-ray machines to strip us of any vestige of privacy or modesty about our own bodies.

FORBES: Big Brother Is Increasingly Watching You

The Green Pine radar is one of the best in the world and together with the X-Band radar system the US recently deployed in the Negev, Israel's ability to detect incoming missiles is significant.

CENTERFORSECURITYPOLICY: An urgent memo to the next government