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Based on the theory of aerothermodynamics for rarefied gas, discusses the principle of compound heat transfer in the vacuum layer.

应用稀薄气体分子热运动理论,研究了真空层复合传热机理,提出了真空层当量导热系数计算方法,分析了不同真空层压力和热媒温度对真空层传热量的影响以及导热、对流和辐射传热量在真空层总传热量中所占比例和变化规律,提出优化真空保温管道保温性能的方法。

To the clear solution of the Grignard reagent, 1.5mol equivalent ofMe(OCH_2CH_2)_2OMe as tetrahydrofuran solution was added drowise at about 0—10℃ during 30 min.,and the mixture was stirred for 3h.

在制备烷基镁的过程中即使加入1.5摩尔当量的二甘醇二甲醚,烷基镁的收率只有88%,这是今后要继续研究的重要方向。

To the clear solution of the Grignard reagent,1.5mol equivalent of Me(OCH2CH2)2OMe as tetrahydrofuran solution was added drowise at about 0--10℃ during 30 min.,and the mixture was stirred for 3h.

在制备烷基镁的过程中即使加入1.5摩尔当量的二甘醇二甲醚,烷基镁的收率只有88%,这是今后要继续研究的重要方向。

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。