短语词组短語planktonic foraminifera shell 有孔蟲殼躰planktonic foraminifera shells 浮遊有孔蟲殼living planktonic foraminifera 浮遊有孔蟲depth stratification of planktonic foraminifera 浮遊有孔蟲深度分層 返回 planktonic foraminifera