These are fast-moving mixtures of hot gas and ash that can travel for considerable distances .

火山灰流是指热气和烟尘混合物的快速移动，而且移动的距离相当远。

White-coat-clad chinese technicians fine-tune chemical mixtures based on customer requests , making incremental tweaks to existing products .

身穿白色工作服的中国技术人员根据客户的要求微调化学混合物，对现有产品进行细小的调整。

New mixtures could also produce more hydrogen , and take a step closer to helping run hydrogen fuel cells .

新混合物也可以产生更多氢气，并离使用氢气燃料电池更近一步。

Researchers modeled the density and viscosity of various water-ice mixtures to determine how quickly such a pocket of liquid water-which is substantially denser than ice-might sink .

研究人员模拟了各种水冰混合物的密度和粘性，来确定实质上比冰密度更大的小范围液态水下沉得有多么快。

These two poles of the organization of moreness exist only in theory because all systems in real life are mixtures of these two extremes .

这两种极端的组织方式都只存在于理论之中，因为现实生活中的所有系统都是这两种极端的混合物。