A nonwoven web of fibers that have a number average diameter of less than 1 micron.

本发明提供了数均直径小于1微米的纤维的非织造纤网。

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The number average molecular weight was determined as 78 650, the weight average molecular weight as 125 446, the molecular weight distribution as 1. 59 by gel permeation chromatography.

采用凝胶渗透色谱仪测试其数均相对分子质量为78 650，重均相对分子质量为125 446，相对分子质量分布为1．59。

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In addition, the obtained results showed that the number average molecular weight is independent of the conversion and only relative to the reaction temperature at lower conversion stage.

此外，结果表明，在低转化阶段，数均分子量不随转化率改变，仅与聚合反应温度有关。

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One way to raise the average fuel economy is to increase the number of electric cars on the road.

VOA: special.2010.11.17

Moreover, it's had a 17.8% average return for the last ten years, which is number one among university endowments.

甚至,过去十年中,耶鲁基金的年均收益率高达17.8%,依然高居全美高校榜首

耶鲁公开课 - 金融市场课程节选

we learned that the average number of romantic relationships for people to take positive psychology in 4 years is between zero and one.

我们了解到上积极心理学课的人,在4年里恋爱次数的平均数在0到1之间。

哈佛公开课 - 幸福课课程节选

In the 19th century, however, the average number of citations to previous cases started climbing sharply and so did the average number of citations to those cases by later Supreme Courts.

ECONOMIST: Statistical modelling

Signs in terminals show distances, down to the number of average steps, between markers.

WSJ: Working Out ... at the Airport

Is it a coincidence that the average number of items sold and the average selling price both increased after implementing mobile point-of-sale devices?

FORBES: Nordstrom Sees Sales Boost From Mobile POS Devices