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Most ingredients of the nuts may hurt the oral mucosa mechanically and chemically. Betel nut chewing has been proved to cause epithelial atrophy, hyperkeratosis, even oral cancer.

槟榔中各种成分会对口腔粘膜产生机械与化学性伤害，许多研究已证实槟榔嚼食者的粘膜常会出现上皮萎缩或过度角化增生，甚至引发口腔癌。

On the other hand, the Ag42In42Ca16 icosahedral quasicrystal is stable both chemically and structurally under the same conditions.

在相同条件下，二十面体准晶Ag42In42Ca16保持不变，具有高的结构和化学稳定性。

They are more chemically reactive and more bioactive," Illuminato says, because of their size, which allows them to easily penetrate organs and cells."

它们更具有化学活力和生物活力，"Illuminato告诫道，因为它们尺度极为微小，因而穿透器官和细胞都极为容易。"

Therefore, To exploit the unique properties and to realize and obtain the full potential of the versatile polysaccharide, attempts are being made to chemically modify them. In the life sciences, agricultural chemicals, medicine, separation inspissation and other fields, phosphorus chemistry has a lot of important applications.

因此，许多研究者逐渐把目光转移到了对壳聚糖的化学修饰方面，希望通过化学修饰赋予其更加良好的物理化学性质以及更好的生物活性，使其应用范围更加广泛。

Isoprene is a monomer, which is a substance whose molecules can be linked together chemically to form a polymer.

异戊二烯是一种单分子物体，该物质的分子可以通过化学反应联在一起，从而形成高分子聚合体。

A preferred form of the invention is a process comprising adding to a quantity of sodium which is covered with a hydrocarbon solvent boiling above 100°C., at least a chemically equivalent proportion of methyl, ethyl or a propyl alcohol, subsequently adding an approximately equivalent proportion of a dialkyl carbonate and of an alkyl phenylacetate, the alkyl groups in these two last-mentioned compounds being preferably the same as the alkyl radical of the above-mentioned lower aliphatic alcohol, heating the mixture to induce reaction and continually distilling out the alcohol formed from the reaction zone.

本发明的理想形式包括下面的工艺过程：把至少处于化学平衡的甲醇，乙醇或丙醇添加到覆盖着沸点超过一百摄氏度的碳氢化合物溶剂中，接着加入大约相同当量的二烷基碳酸酯和烷基乙酸苯酯，在刚才提到的化合物中，其烷基集团最好是和刚才提到的低级别脂肪族醇相同，然后加热反应混合物从而引导反应的进行，在反应区域通过连续蒸馏移除形成的醇类。

Process for the manufacture of a dialkylphenylethylmalonatewhich comprises adding to a quantity of sodium which is covered with a hydrocarbon solvent boiling above 100°C, at least a chemically equivalent proportion of methyl, ethyl or a propyl alcohol, subsequently adding an approximately equivalent proportion of a dialkylcarbonate and of an alkyl phenylacetate, the alkyl groups in these two last-mentioned compounds being preferably the same as the alkyl radical of the above –mentioned lower aliphatic alcohol, heating the mixture to induce reaction and continually distilling out the alcohol formed from the reaction zone and finally causing the sodio diethyl phenylmalonate so formed to interact with an ethylating agent.

生产二烷基苯基丙二酸酯的工艺过程：这包括这包括把至少处于化学平衡的甲醇，乙醇或丙醇添加到覆盖着沸点超过一百摄氏度的碳氢化合物溶剂中，接着加入大约相同当量的二烷基碳酸酯和烷基乙酸苯酯，在刚才提到的化合物中，其烷基集团最好是和刚才提到的低级别脂肪族醇相同，然后加热反应混合物从而引导反应的进行，在反应区域通过连续蒸馏移除形成的醇类。最后使所形成的钠代二乙基苯基丙二酸酯和乙基化试剂反应。

The idea of this approach is that the chemically meaningful subspace is the most stable one with respect to the linear transformation of the two way data along one order.

该方法的基本思想是具有化学意义的子空间对在一个方向上的二维数据的线性变换是最稳定的。

So has the use of vitamin A to strengthen children's immune systems, and chemically treated bed nets to prevents malarial.

而且，应用维生素A来加强孩子的免疫系统，用化学的方法来处理基础网状物以预防疟疾。

The additives are proved to be chemicals similar to a copolymer of styrene and maleic acid and stearic acid or its obtained from samples and the residues of chemically treated samples.

通过对原样品及酸化、碱洗样品的红外谱图分析和TGA分析，确定了相应的添加剂为类苯马聚合物和硬脂酸或其衍生物。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。