不纯

In this thesis, we developed a new method to construct 2, 3, 6-trisubstituted piperidines using enantiopure -amino acid derivatives as the starting material and applied them to the synthesis of some piperidine alkaloids which showed interesting physiological activities.

本论文中，我们从非手性原料出发，通过手性胺对、(-不饱和酯的Michael加成来获得光学纯的-氨基酸酯，发展了一种构建2、3、6-三取代哌啶环的方法，并利用这种方法合成了一些具有重要生理活性的生物碱类天然产物。

This is most unsecured because it uses plain text transfer of both userid and password to the server.

这是最不安全的，因为它使用的用户ID和密码都以纯文本的服务器传输。

One class of contracts, in which the plighted faith of the contracting parties was the only material ingredient, they specifically denominated Contracts juris gentium, and though these contracts were undoubtedly the latest born into the Roman system, the expression employed implies, if a definite meaning be extracted from it, that they were more ancient than certain other forms of engagement treated of in Roman law, in which the neglect of a mere technical formality was as fatal to the obligation as misunderstanding or deceit.

喜爱研究的人们在目前所乐于从事的工作，以及答复我们祖先对社会状态起源所持纯理论的工作，是对现在存在和在我们眼前活动的社会进行分析；但是，由于缺少历史的帮助，这种分析就时常退化而成为一种徒然是好奇心的活动，并且特别容易使研究者不能理解和他所习见的有很大不同的社会状态。

In 1986, he challenged the nomination of political scientist Samuel P.

亨廷顿不具备院士拥有的纯科学品质，指责塞缪尔。P。

The results showed that the most important factors related to the accuracy were the recrystallized potassium persulfate and the sodium hydroxide.

通过试验发现，过硫酸钾、氢氧化钠的纯度是影响测定准确性的最重要因素，其中分析纯AR级的过硫酸钾(K2S2O8)经纯化处理可以降低空白值；消解时间的延长和消解温度增加对提高实验准确性的影响不显著。

The photoluminescence spectrum of the nanosaws showed stronger visible emission band as compared to undoped ZnO powder at room temperature.

纳米锯的光致发光谱表明，在室温下它有比不搀杂的纯氧化锌粉末更强的可见光发射带。

The photoluminescence spectrum of the heterostructured nanorotors showed stronger visible band emission as compared to pure ZnO powder at room temperature.

纳米转子的光致发光谱比不搀杂的纯氧化锌粉末有更强的可见光发射带。

He followed the pragmatist philosopher John Dewey in seeking an "ever-enduring process of perfecting" rather than perfection.

他奉行实用主义哲学家杜威的分析逻辑，追求「不断纯美的永恒过程」，而不是绝对的完美。

Yet if the image contains no information and is purely presentational, you may want to separate the image from the rest of your content.

但是，如果图像不包含信息，是纯装饰性的，那么可能希望将图像从其余内容中分离出来。

If it succeeds in this, it has no need to criticize the pure faculty itself in order to see whether reason in making such a claim does not presumptuously overstep itself (as is the case with the speculative reason).

如果在此成功，它没有必要批评本身纯系为了看到在作出这样的说法不擅自超越本身（这是与投机的理由的情况下）是否原因。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。