烯烃

These include some terpenes, hydrocarbons, alcohol, and other miscellaneous materials released from the wood upon pulping.

在硫酸盐法制浆过程中还排放出一些无气味的有机化合物，包括萜烯，烃，醇和其它制浆过程中木材原料释放出来的物质，这些化合物的重要性和排放率并未被很好地描述。

Firstly, Vinyl ethers were prepared in a one-pot, two-step transformation by O-alkylation reaction of 2-hydroxyalkyl phenyl selenides with primary or secondary organic halides followed by oxidation-elimination with 30 % hydrogen peroxide.

1.2-羟基烷基苯基硒醚和伯、仲卤代烃通过O-烷基化反应，然后用30％的双氧水进行氧化消除反应，提供了&两步、一锅法&合成烯基醚的新方法，该方法反应条件温和，操作简便，产物收率中等到良好(70-85％)。

Using this reaction, a three-component reaction to synthesize tetrahydrofuran derivatives was studied.

另外我们还对炔烃碳钯化启动的烯炔偶联反应进行了初步的探索。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。