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长颈烧瓶

与 长颈烧瓶 相关的网络例句 [注:此内容来源于网络,仅供参考]

The preparation method comprises the following steps in sequence:(1) metric acetonitrile is added into a dual-bottleneck distilling flask that is provided with a refluxing and condensing tube, and simultaneously, long-chain dialkyl methyl tertiary amine and relevant saturated dihalide are added thereof;(2) nitrogen is pumped for 10 to 20 minutes for deoxidizing;(3) a magnetic mixing reaction is carried through for 10 to 15 hours under the condition of 78 to 83 DEG C.

其制备方法依次包括以下步骤:(1)在装有回流冷凝管的二颈蒸流烧瓶中,加入计量的乙腈,同时按一定比例加入二长链烷基甲基叔胺与相应的二卤代烷;(2)通氮气10-20分钟,排除氧气;(3)在78-83℃条件下磁力搅拌反应10~15h。

A vial or round long-necked vessel for laboratory use.

烧瓶实验用的一种小瓶或长颈容器

推荐网络例句

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。