推荐回答（2个）
许多已知的冰阶段表现出了质子订购
转型，例如从质子无序
六角冰（星期四）以质子下令冰十一.1最近，两个
新质子命令冰阶段（十三和十四）已reported2
有关冰第五和第十二， respectively.Preparation若干冰
阶段并不简单，这解释了为什么直到最近，
只有一个新的冰阶段已经发现在过去20 years.3
特别是，排列形式的冰可能难以孤立内
该实验室因为动力学障碍分子轮换
是重要的低temperatures.Computer仿真提供了一个
辅助方法，在其中的影响，压力，温度，
和配置可以名义上控制十分精确，以
允许系统测绘阶段diagram.However的
Verity的任何模拟方法取决于其生育能力
不同的国家分相diagram.As挑战理论，
我们最近进行了一项双盲试验预测质子有序
形式的冰第十二称为冰十四。
虽然每个冰氧原子必须四面体协调员
化（在一个完美的网格） ，氢原子可能是无序的。
安排的质子在一个冰结构的确定
由贝尔纳福勒冰rules4其中规定： （ 1 ）必须有
两个氢原子毗邻每个氧气和（ 2 ）必须有
只有一个氢每表明，氢bond.Pauling5
任何冰阶段大约有（ 3 / 2 ）不适用何种方式
氢原子可安排，并建议所有可能的
结构的某一阶段是degenerate.However ，存在
质子命令无效这一阶段postulate.The质子
命令阶段有不同的特性从无序母公司
阶段，例如，冰七可以转化为质子下令冰
八的相关变化，晶胞参数和密度。
impossible between members of different species because genitals of males and females are structurally incompatible or because molecules on the surfaces of sperm and egg fail to bind. A final type of prezygotic mechanism is temporal isolation, in which time-related environmental cues that trigger reproductive processes are different for related species.
有时，产生前合子隔离的差异涉及了隔离机制。即，由于生殖器结构不匹配或精卵分子表面不结合而使不同种群成员间不能自然结合。最后一类前合子机制是暂时隔离，与时间有关的环境因素触发了相关物种的不同繁殖过程。
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