A series of new aromatic poly(amide imide)s PI-P IV containing phthalazinone moieties are synthesized from the novel diamines I - IV by direct Yamazaki polycondensation.

设计将扭曲、非共平面的杂萘联苯结构引入聚芳酰胺亚胺的大分子主链，获得了耐高温、可溶解的新型聚芳酰胺亚胺。

youdao

She′s on the board of a Raspberry Pi which produces very simple and cheap computer designed to encourage children to become involved in programming.

也是树莓派公司的董事会成员，该公司致力于设计生产简单廉价的电脑以鼓励儿童积极参与编程学习。

youdao

Objective To explore the significance of glutathione S transferase (GST pi) in the early diagnosis of colorectal carcinoma.

目的探讨谷胱甘肽S-转移酶（GST）在大肠癌早期诊断中的价值及意义。

youdao

So let's have a clicker question here on how many total pi bonds do you expect to see in benzene?

让我们来做个课堂习题,你们觉得苯环里有一共多少个π键？

麻省理工公开课 - 化学原理课程节选

There's absolutely no reason I couldn't have switched it around and said that instead the pi orbitals form between these atoms instead of those first atoms I showed.

我完全没有理由,不能把它转过来,现在π键在这些原子间,而不是我开始展示的那些原子间。

麻省理工公开课 - 化学原理课程节选

And we can simplify this expression as saying negative e squared over 4 pi, epsilon nought r squared. Epsilon nought is a constant, it's something you might see in physics as well.

也会遇到它,在这里，你可以就把它,理解为一个转换系数,我们需要做的。

麻省理工公开课 - 化学原理课程节选

Erickson alleges that Blake's pi song "sounded substantially similar, " and therefore infringes the copyrighted melody that Erickson registered in 1992.

CNN: STORY HIGHLIGHTS

The movie's Pi (Suraj Sharma) is considerably more circumspect than the novel's, and understandably so -- Richard Parker is more ferocious in the flesh than he was on the page.

CNN: Review: 'Life of Pi' is bold and wondrous

It's only when Pi's world is turned upside down that the film really finds its sea legs.

CNN: Review: 'Life of Pi' is bold and wondrous