More and more young people were sporting tuffs of hair on their lips.
越来越多的年轻人喜欢炫耀争吵边这些染成凝灰岩色的小胡子。
2
The volcaniclastic rocks can be seen as fused lumps, fused breccias and fused tuffs.
火山碎屑岩可见熔集块岩、熔角砾岩和熔结凝灰岩。
3
The dates of these tuffs proved indistinguishable-4.4 million years for both. This meant the volcanic eruptions had captured between them a focused lens of time-perhaps as little as a thousand years.