三原子的

In the second chapter, we introduce the semi-classical theoretical method based on single three-level A atom and the whole quantum method processing given to deal with the electromagnetically induced transparency system.

第二章系统地介绍了基于单个Λ型三能级原子的EIT机制的半经典理论处理和全量子方法处理。

Moreover, we explored the three-carbon radical chain extension and ring expansion.

此外，初步探索了增加三个碳原子的自由基反应。

In addition ,nine new O,O-dialkyl-[α-(1,3,4,6-tetraacetyl-2-deoxy-β-D-glucoamino)-p-methyl benzlidene] phosphonatesand eight O,O-dialkyl-α-(2-deoxy-D-glucoamino)-p-methyl benzylidene phosphonates were prepared. The 〓 and〓 spectra of Ⅰ-Ⅴ compounds indicated clearly that each of Ⅰ-Ⅴ compounds contains two diastereo-isomers.

我们对非对映异构体的分离方法进行了研究，并分离得到了五个单一构型的异构体〓、〓、〓、〓和〓，培养出了〓、〓和〓三个异构体的单晶，通过X-射线衍射分析，确定了〓、〓和〓三个异构体的绝对构型，反应过程中引入的手性原子的构型均为R构型。

The spectral data suggest that intramolecular carbonyl oxygen to tin coordination in 1 is existent and is not allowedin order to accommodate two and three bidentate dithiocarbamate ligands in 3 and 4 respectively.

波谱数据表明化合物1和2存在着分子内羰基氧原子对锡原子的配位，而在化合物3和4中这一配位则被两个或三个双齿二硫代氨基甲酸配体所替代。

A salt of iodic acid .

加有三个碘原子的甲腺氨酸。

An ester or a salt of perchloric acid .

加有三个碘原子的甲腺氨酸。

Thyronine with three iodine atoms added.

加有三个碘原子的甲腺氨酸。

Chapter 4 introduces the calculation method of Fermi resonance levels forlinear triatomic molecules.

第四章介绍线形三原子分子Fermi共振能级的计算方法。

There are two aldoses containing three carbon atoms.

有两个包含三个碳原子的醛糖

Aspecial sturcture containing two one-fold atoms, two triple bond (1.95),was obtained after geometry optimization.

在模型几何优化中，得到了带有2个一配位原子的特殊结构，它含有2个三键（1.95）。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。