DickinsoniaBNC²³⁶²¹³⁺¹ 基本例句 狄更逊水母属腔肠类；C1；狄氏水母｛前寒武代｝ However, later that year, when Sprigg found the frond-like forms he called Dickinsonia, he was certain that such geometrical impressions could have been made only by living creatures. 同年晚些时候，斯普里格又发现了一些叶状的、他称之为“狄更逊水母 Dickinsonia”的印记，他于是确信，这种地质印记只能是生物留下的。 yeeyan