二价

The practice showed that the blast furnace slags mainly consisted of melilite,cuspidine,bivalent metallic sulphide and Ce-Ca silica.

黄长石、枪晶石、金属硫化物、铈钙硅石是构成高炉渣的主要矿物。

The chiasmata can slip off the ends of the bivalents, and thus chiasma frequency may be reduced by terminalization.

有时交叉以从末端处滑开，因此移端过程以降低交叉频率。

Terminalization The movement of chiasmata to the end of the bivalent arms, a process that may occur during late prophase I of meiosis.

交叉)移端：第一次减数分裂后期，染色交叉向染色臂的末端移动的过程。