化合的

Sodium is never found uncombined in nature.

自然界中的钠被发现都处于化合状态。

We researched on the prepartion of pivotal intermediate 2 and 3 for 1 P-methyl carbapenem antibiotics from intermediate 1, which is subjected to Reformastky reaction, N-alkylation, Dieckmann-type cyclisation, enolization, ester condensation etc. in sequence. The synthesis route of document is optimized by us.

我们研究了1β-甲基碳青霉烯类重要中间体的合成，从中间体1出发经Reformastky反应、水解反应合成出中间体2；经Reformastky反应、烷基化、Dieckmann环合、烯醇化、酯化合成出中间体3，并对其中各步反应作了优化和探索。

The reason why air makes fireburn more intensely was learned only abouttwo hundred years ago, when severalscientists finally proved that oxygen, oneof the gases air contains, can combinewith certain other elements like carbon to release muchheat.

当时某些科学家终于证明，空气中有一种气体叫氧，它能够与其它一些元素化合，从而释放出大量的热。

The reason why air makes fireburn more intensely was learned only abouttwo hundred years ago, when severalscientists finally proved that oxygen, oneof the gases air contains, can combinewith certain other elements like carbon to release muchheat.

参考译文：空气为什么能使火燃烧得更旺？直到大约2 0 0 年前才弄清其原因。当时某些科学家终于证明，空气中有一种气体叫氧，它能够与其它一些元素化合，从而释放出大量的热。

Molecular sieve and solid acid of SO~(2-)_4/ZrO_2, ionic liquids, and rare earth perfluoro alkyl sulfosalts to formylate alkylbenzene by carbon monoxide to synthesize alkylbenzaldehyde was introduced.

介绍HCl-AlCl3、HF-BF3和CF3SO3H-SbF5等B-L复合酸，分子筛和固体酸，离子液体以及稀土全氟烷基磺酸盐作催化剂在烷基苯用CO甲酰化合成相应烷基苯甲醛工艺中的应用进展。

A spray drying process of preparation of diisporopyl malonate with super acid as catalyst was studied.

介绍了一种以喷雾干燥脱水，以超强酸催化酯化合成丙二酸二异丙酯的方法。

A method using α methylstyrene as raw material to prepare β methylene phenethyl alcohol,a new rose flavor ,by chlorination,esterification and saponification was studied.

对α 甲基苯乙烯经氯代、酯化、皂化合成新型玫瑰香料β亚甲基苯乙醇的方法进行了研究，选择PTC1作为相转移催化剂，当m∶m (NaAc·3H2 O)∶m (PTC1 )=1 。0 0 0∶0 30 0∶0 0 2 4时，80℃下反应 6h ，产率为 67 3%。

Benzyl phenylacetate was synthesized by benzyl chloride with the salt prepared by phenylacetic acid and Na2CO3 under microwave irradiation and in presence of phase transfer catalyst without any organic solvent and inorganic carrier.

采用微波辐射相转移催化技术，以四丁基溴化铵为相转移催化剂，先将苯乙酸与碳酸钠成盐，在无有机溶剂和无机载体的条件下与氯化苄直接酯化合成苯乙酸苄酯。

Easy to dissolve in the water, does not dissolve in the organic solvent, water absorbant, absorbs water gradually in the air assumes sticks the porodine, can with the alkali soils metallization synthesis solubility duplicate salt, be one good water softener.

易溶于水，不溶于有机溶剂，吸湿性强，在空气中逐渐吸水而呈粘胶状，能与碱土金属化合成可溶性复盐，是一种良好的软水剂。

The gelatin-siloxane nano-particles are prepared from gelatin and 3-(2,3-epoxy propoxy )propyltrimethoxysilicane by performing chemical combination and hydrolytic reaction in acidic condition to obtain sol; and adjusting the pH value to slightly alkaline for performing polymerization reaction of silicane.

将明胶和3-(2，3-环氧丙氧)丙基三甲氧基硅烷在酸性条件进行化合、水解反应；将该溶胶的pH值调节至弱碱性，使硅烷发生聚合反应，即可得明胶-硅氧烷纳米颗粒。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。