Both of these lobes together constitute a pi bond.

上下两片叶一起组成了一根 π 键。

youdao

This fine tirade sounded, however, to the ungodly sailor-boy like a mere Pippi-pi.

然而，对这只不听话的小云雀来说，这番长篇大论听起来就是“叽叽喳喳”。

youdao

Pi orbitals are a molecular orbital that have a nodal plane through the bond axis.

轨道是沿着键轴,有节面的分子轨道。

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This is because most fraternities and sororities are named after a series of Greek letters, such as Alpha Delta Pi or Sigma Phi.

VOA: special.2009.09.25

Once you've got that, you can do minus 7 times a vector Just take the vector, multiply it by Pi and flip it over.

明白这点之后,你就可以计算-7乘以矢量,只需用 π 去乘以那个矢量,然后将其方向调转

耶鲁公开课 - 基础物理课程节选

sigma That is one pi orbital. There is one sigma, one pi and there is a second pi, and that is how we are getting the triple bond.

那是一个pi轨道，有一个，一个pi，还有第二个pi轨道，这就是我们如何得到三线态的。

麻省理工公开课 - 固态化学导论课程节选

Mr. Blake derived a simple melody by playing a few dozen digits of pi using a C-major scale, with 3, 1, 4, 1, 5, 9 translated to the notes E, C, F, C, G, D and so on.

WSJ: We Can All Have a Slice of Pi | Postmodern Times by Eric Felten

Software that turns a Raspberry Pi computer into a time-lapse camera has won a contest for teenage programmers.

BBC: Time-lapse code wins Raspberry Pi contest

Researchers at the University of Southampton have followed their instincts and built Iridis-Pi, a tiny 64-node cluster based on the Raspberry Pi's usual Debian Wheezy distribution and linked through Ethernet.

ENGADGET: Supercomputer built from Raspberry Pi and Lego, managed by humans rather than Minifigs