Aa lava, on the other hand, moves faster and doesn't have time to develop a skin, resulting in a cooler flow with a more angular texture.
另一方面，块状熔岩移动地更快，没有时间形成外皮，这就导致了岩浆较冷却的流动形成了更有棱角的质地。
What generally distinguishes "a" grade wood from "AA" grade is the presence of some slight color in the wood and some variation in the uniformity of texture.
级和AA级木材的区别在于：A级木材存在一些颜色的轻微变化，木材结构的均匀度有一些变化。
What generally distinguishes "a" grade wood from "AA" grade is the presence of some slight color in the wood and some variation in the uniformity of texture.
级和AA级木材的区别在于：A级木材存在一些颜色的轻微变化，木材结构的均匀度有一些变化。
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