The results indicated that the mechanism of V(IV) oxidation is the reaction with one-electron transfer and two-proton transfer.

V（IV）的氧化反应机理研究表明，V（IV）氧化反应存在一个电子转移和两个质子转移。

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XPS analysis shows that the vanadium on the surface can be stabilized mainly in the state of V(IV).

通过XPS分析，证实钒元素主要以V（IV）价态存在于催化剂的表面。

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French universities are named very poetically, Paris I,II,III,IV,V,VI, all the way through XIV, which is a real hole, or XIII is probably the worst.

巴黎的大学命名得都很有诗意,巴黎第一大学,第二大学,第三大学,以此类推,一直到第十四大学,这是真实存在的,第十三大学可能是最差的

耶鲁公开课 - 1871年后的法国课程节选

So that's I,IV,V,I.

所以是一，四，五，一。

耶鲁公开课 - 聆听音乐课程节选

There's the IV chord and there's So you sing this nice and loud for me, please.There's the tonic.Ready,go.

然后出现了IV级和弦，紧接着是V级和弦，又回到I级和弦,你们大声地把这一段唱给我听，这个是主音，预备，唱。

耶鲁公开课 - 聆听音乐课程节选

" He returned to play small roles in the company's 1990 productions of "Henry V" and "Henry IV.

WSJ: 'Mad Men' Vincent Kartheiser finds a new role

And there was -- Turkey raised issues on -- related to capabilities, did not raise the issue of Syria or Article IV or Article V.

WHITEHOUSE: Press Briefing on NATO Defense Capabilities

Uncertainties about DECREASE IV, DECREASE V-pilot study, and pilot studies for DECREASE VI are soon to be communicated to the respective journals so that further action may be taken.

FORBES: Embers Of Poldermans Case Still Smoldering