/2 You can have it equal to plus 1/2, and that's what we call spin up, 1/2 or you can have it equal to minus 1/2, which is what we call spin down.

它可能会等于，我们叫它自选朝上，或者它等于负，我们叫它自旋朝下。

麻省理工公开课 - 化学原理课程节选

swinging a baseball bat at me on the subway train for no reason, except that he's crazy.

他在地铁上无端地朝我挥动棒球拍，没有理由，除非他疯了。

向哥伦布学习 - SpeakingMax英语口语达人

So, babies have these big, protruding foreheads, an upturned little nose, chubby cheeks and big eyes.

所以，孩子有大而突出的额头，朝上的小鼻子，胖胖的脸颊，大大的眼睛。

耶鲁公开课 - 心理学导论课程节选

So you can see, if it's spinning on its own axis in this direction we'd call it spin up, where as this way it would be what we call spin down.

你们可以看到，如果它绕自己的轴朝这个方向转,我们就说它是自旋朝上，这个方向我们叫它自旋朝下。

麻省理工公开课 - 化学原理课程节选

By the way, I didn't tell you this but I think you know that I picked my origin to be here and measured y positively to be upwards and I called that 15 meters.

顺便说一下,虽然我没明确指出,但我想你们应该都知道,我把原点取在这里,并规定y的正方向朝上,我设把这里的高度为15米

耶鲁公开课 - 基础物理课程节选