In a semiheavy water molecule, one hydrogen atom (H) is replaced with a heftier version called deuterium (D).
在半重水的水分子中，一个氢原子（H）被一个称之为氘（D）的氢原子的同位素所取代。
On a molecular level, D-tagatose is structurally identical to D-fructose, except for an inversion of the hydroxyl and hydrogen groups at the fourth carbon atom.
塔格糖是果糖的“差向异构体”，在分子水平上，除了第四个碳原子上的羟基和氢基团倒置外，D -塔格糖与D -果糖的结构是一样的。
There is a chiral carbon atom in the EAMP's molecule and it has been proved that the S-EAMP has higher biological activity than that of the D-EAMP.
它的分子结构中有一手性碳原子，大量研究结果证明其左旋光学异构体的生理活性比右旋异构体要高很多。
The equation of motion of two-electron atom in 3-D space is transformed into that of one-electron atom in 6-D space, subjected to generalized Coulombic potential.
将二电子原子在三维空间中的运动转化为单电子原子在六维空间中受广义库仑力作用的运动。
Replacing H-atom with D-atom, isotropic shifts were observed in the loss spectra.
用氚原子代替氢原子吸附在金刚石表面，观测到上述振动模式所发生的同位素位移。
Replacing H-atom with D-atom, isotropic shifts were observed in the loss spectra.
用氚原子代替氢原子吸附在金刚石表面，观测到上述振动模式所发生的同位素位移。
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