单词学习：sedimentary rock 地质学/科学
sedimentary rock
/ˌsedɪˈmentri rɒk/
沉积岩
Gu Laoshi explained that sedimentary rock often contains fossils of ancient organisms.
顾老师解释说，沉积岩中常常含有古生物的化石。
单词卡片
卡片已就绪
