二价

The compounds, in which it has valence 2, are used as insulators and refractories and in fertilizers, cement, rubber, plastics, foods, and pharmaceuticals (antacids, purgatives, laxative s).

在二价化合物中，镁被用作绝缘体和耐火材料；也用于化肥、水泥、橡胶、塑料、食品和药物。

The compounds, in which it has valence 2, are used as insulators and refractories and in fertilizer s, cement, rubber, plastics, foods, and pharmaceuticals (antacids, purgatives, laxatives).

在二价化合物中，镁被用作绝缘体和耐火材料；也用于化肥、水泥、橡胶、塑料、食品和药物。

The compounds, in which it has valence 2, are used as insulators and refractories and in fertilizers, cement, rubber, plastics, foods, and pharmaceuticals (antacids, purgatives, laxatives).

在二价化合物中，镁被用作绝缘体和耐火材料；也用于化肥、水泥、橡胶、塑料、食品和药物。

In this study, the green alga Haematococcus pluvials were respectively and simultaneously exposed to active oxygen reagentsMB, H_2O_2 solution, and mixed solution of H_2O_2 and Fe~(2+ to study the physiological variety and characteristic of astaxanthin accumulation by determining cell density, chlorophyll-a content, biomass and the astaxanthin content.

为了探索活性氧诱生剂对雨生红球藻生长及虾青素含量的影响，设计了在雨生红球藻藻液中分别和组合添加亚甲基蓝(MB，产生~1O_2)、过氧化氢溶液(H_2O_2)以及过氧化氢和二价铁离子的混合溶液的实验，测定了细胞密度、叶绿素a含量、生物量和虾青素含量等指标。

Two coordination polymers [Pb6(H2O)24]·3H2O(1)(H3cit=citric acid)and Pb(H2O)2(2)(tar=tartaric acid)were synthesized under hydrothermal conditions and characterized via IR,TG-DTA,C,H,N elemental analysis,XRD and single crystal X-ray diffraction analysis.

在水热条件下，合成了2个含柔性配体柠檬酸和酒石酸的二价铅配位聚合物[Pb6(H2O)24]。3H2O(1)(H3cit=citricacid)及Pb(H2O)2(2)(tar=tartaricacid)。用红外光谱、差热-热重、元素分析、粉末X射线衍射及单晶X射线衍射等手段对化合物进行了表征。化合物1属三斜晶系，P1空间群，a=0.97053(19)nm，b=0.9764(2)nm，c=1.0955(2)nm，α=109.016(3)°，β=98.380(3)°，γ=92.136(3)°，V=0.9671(3)nm3，Z=2，R1=0.0420，wR2=0.1049，GOF=1.064。

Density functional calculations predicted that both the ZrO3 and HfO3 molecules possess a closed-shell singlet ground state with a non-planar Cs geometry, in which the side-on coordinated O2 falls into the peroxide category.

结果表明ZrO3和HfO3都具有单重电子基态以及非平面的Cs构型，可以看作金属一氧化物二价正离子与过氧配体形成的络合物。

It was found that the content of Zn bound in polymeric matrix is all-important to the formation and optical activity for supramolecular aggregates.

由Et_2Zn和Et_2Zn／n-BuLi二元体系合成的聚合物在二价铜盐作用下发生独特的超分子聚集现象。

Consisting of a pair of homologous,synapsed chromosomes,as occurs during meiosis ;double.

二价染色体的由一对同源，联会染色体组成的，如在成熟分裂时出现的；双的

This is a fixed price.

这是不二价。

The price is fixed.

我们是不二价的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。