Say when you're at the front of C prime, your thumb points to the right, your index points up because that's where the surface is, and then your middle finger will point out.

你在曲线C的前端，你的拇指指向右边，你给指出来了，因为那就是这个表面所在，然后你的中指就会指出。

youdao

I know the index-card waltz of (auto)biographies, poems and novels you are dancing: those same names are still so close to the surface of my mind nearly four decades later.

我知道你的手指曾在那些目录页上来回舞动---华尔兹的传记，诗歌，小说，四十年后的今天，我仍清楚的记得这些。

youdao

Then I want to make my index finger point towardS the surface.

然后让食指指向那个曲面。

youdao

But by the Berkeley team's analysis, the global temperature correlates more closely with the state of the Atlantic Multidecadal Oscillation (AMO) index - a measure of sea surface temperature in the north Atlantic.

BBC: Global warming 'confirmed' by independent study

These short-term global fluctuations are associated principally with natural oscillations of tropical Pacific sea surface temperatures summarized in the Nino index in the lower part of the figure. 2012 is nominally the 9th warmest year, but it is indistinguishable in rank with several other years, as shown by the error estimate for comparing nearby years.

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They then used that proxy data, which they dubbed the Paleo Index (PI) and compared it to the merged land-ocean surface temperature (MLOST) records developed by the National Climactic Data Center.

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