initial oceanic crust的用法和樣例：
例句
- The sinking of oceanic crust at subduction zones carries water and carbon dioxide back into the mantle.
在俯沖區洋殼下沉，又把水和二氧化碳帶回地下。 - The Ophiolite massifs are composed of mantle peridotite that is mainly harzburgite and dunite, and lacked of crust magmatite within the typical Ophiolite suite.
摘要該蛇綠巖帶的巖體由地幔橄欖巖組成，主要巖石類(lèi)型是方輝橄欖巖和純橄欖巖，缺少典型蛇綠巖剖面中的洋殼單元。
