1、 The Pteranodon ate meat. They ate fish, mollusks, crabs, insects and dead animals.
无齿翼龙是肉食动物. 它们吃鱼, 软体动物, 螃蟹, 昆虫,和动物死尸.
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2、 He began his career as a zoolist, studying mollusks and their adaptations to their environment.
他开始动物学家的生涯, 研究软体动物和其适应环境的各种方法.
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