4周搞定2000+托福核心词
cephalpod = cephal(头) + pod(脚) = 头足动物
copepod = cope(砍) + pod(脚) = 桡脚类的动物
四足
tetrapod
常考释义
One of the most significant evolutionary events that occurred on Earth was the transition of water-dwelling fish to terrestrial tetrapods (four-limbed organisms with backbones).
水中栖息的鱼类进化为陆地四足动物（有脊椎的四肢生物）是地球上发生过的重大进化事件之一。
来源于：阅读OFFICIAL44 P1n. 四足动物
The report says the footprints of the tetrapod measure up to 26 centimeters (10 inches) wide, which scientists say is indicative of an animal around 2.5 meters (7.5 feet) in length.
研究报告中说，四角龙的脚印宽达26厘米（10英尺）。科学家说，这意味着它的体型约为2.5米高。
One of the most significant evolutionary events that occurred on Earth was the transition of water-dwelling fish to terrestrial tetrapods (four-limbed organisms with backbones).
水中栖息的鱼类进化为陆地四足动物（有脊椎的四肢生物）是地球上发生过的重大进化事件之一。
来源于：阅读OFFICIAL44 P1The bones of the fins of a Devonian rhipidistian exactly match in number and position the limb bones of the earliest known tetrapods, the amphibians.
泥盆纪扇鳍鱼的鳍骨在数量和位置上与已知的最早的四足动物的肢骨完全匹配。
来源于：阅读OFFICIAL44 P1Evidence from teeth suggests that these earliest tetrapods did not utilize land plants as food; they were presumably carnivorous and had not developed the ability to feed on plants.
对四足动物的牙齿的研究表明，最早的四足动物并不食用陆生植物；它们可能是食肉动物，而且也尚未形成食用植物的能力。
来源于：阅读OFFICIAL44 P1How did the first tetrapods make the transition to a terrestrial habitat?
第一批四足动物是怎样向陆地环境过渡的呢？
来源于：阅读OFFICIAL44 P1However, many problems that faced early land plants were not applicable to the first tetrapods.
不过，早期陆生植物面临的许多问题并不会困扰到它们。
来源于：阅读OFFICIAL44 P1The principal changes for the earliest tetrapods were in the skeletal system—changes in the bones of the fins, the vertebral column, pelvic girdle, and pectoral girdle.
最早期的四足动物主要进化的是骨骼系统，即鳍骨、脊柱、骨盆、肩胛骨发生变化。
来源于：阅读OFFICIAL44 P1adj. 四足动物的
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