常见例句双语例句The surrounding islands all consist of conical masses of greenstone, associated sometimes with less regular hills of baked and altered clay-slate.周围的岛屿都由大量的圆锥形绿岩所组成，它们有时也与不太规则的烤硬了的、变形的粘土-板岩山有关联。 返回 clayslate