noun 下载 🔗分享 箭石，箭石类。 Any member of the extinct order †Belemnitida of Mesozoic marine cephalopods, very similar in many ways to the modern squid and closely related to the modern cuttlefish. Examples : "While hiking along the coast, my daughter found a fossil shaped like a bullet; our science teacher later identified it as a belemnite, the internal shell of an ancient squid-like creature. " 沿着海岸徒步时，我女儿发现了一个形状像子弹的化石；后来我们的科学老师鉴定说那是箭石，一种古代类似鱿鱼的生物的内壳。 geology biology animal ocean 与AI对话词汇游戏阅读练习
