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不像乌贼，鹦鹉螺有保护壳。 Unlike squid, though, they had protective shells. | ||
黄色的部分则是鹦鹉螺牙齿的残留部分。 The yellow is the remains of the ammonite's teeth. | ||
这幅图片向我们展示了一枚鹦鹉螺的最后一次进食。 THIS picture shows an ammonite's last meal. | ||
鹦鹉螺采用开放式架构设计，支持采用新型元件和技术升级。 The Nautilus USES an open architecture to support replacement components and newer technologies. | ||
鹦鹉螺化石，这些螺旋状的贝壳，经常分布在二叠纪的化石群中。 Ammonoids, with their tightly coiled, spiral shells, are also widespread in the Permian fossil record. | ||
这样的结构具有中性浮力，使得鹦鹉螺能够靠后推力移动（像枪乌贼一样）。 The result had neutral buoyancy, allowing the animal to move (like squid) by jet propulsion. | ||
在拥挤的海面和水中航行时，鹦鹉螺显示器增强了船的安全性。 The Nautilus enhances ship safety during surfaced and submerged operations in crowded waters. | ||
1954年：美国第一部原子潜艇“鹦鹉螺”号于康乃迪克州哥顿市启航。 In 1954, the first atomic submarine, the us "Nautilus," was launched at Groton, Connecticut. | ||
有些鹦鹉螺化石上的齿痕看起来好像是由巨大的爬虫类捕食者沧龙留下的。 Some ammonite fossils have tooth marks that look as though they were made by huge reptilian predators called mosasaurs. | ||
鹦鹉螺还能抵抗撞击、振动、防盐防雾、防渗水并能经受噪声和电磁干扰的影响。 The Nautilus meets withstands shock, vibration, salt, fog, drip, fungus, acoustic noise, and EMI. | ||
