nautilus

一种海洋软体动物,属于鹦鹉螺科,原产于太平洋和印度洋,具有触手和带有多个气室的螺旋壳,鹦鹉螺属为其模式属。

A marine mollusc, of the family Nautilidae native to the Pacific Ocean and Indian Ocean, which has tentacles and a spiral shell with a series of air-filled chambers, of which Nautilus is the type genus.

由核动力推进的潜艇

a submarine that is propelled by nuclear power

一种通过压缩空气下沉或上升的潜水钟。

A kind of diving bell that sinks or rises by means of compressed air.

温暖海域的头足类软体动物,雌性有精致的纸质螺旋壳

cephalopod mollusk of warm seas whose females have delicate papery spiral shells