Recently, living cells - many of which are Archaea from the Pyrococcus and Thermococcus genera - were found in a mud core taken from 1.6 km below the sea floor off the coast of Newfoundland.
最近，纽芬兰岛海岸的海床之下1.6千米深处取出的砂心泥中，发现了活着的细胞，其中很多是热球菌纲火球菌属的古菌。
Type genus of the family ulvaceae; green seaweed having a thallus two cells thick: sea lettuce.
石莼科的模式属；绿色海藻具有两个细胞厚度的叶状体；海莴苣。
Most of them live in the sea and have arms covered with stinging cells. They feed on plankton.
它们中的大多数生活在海洋中，手臂上铺盖着蛰刺细胞，以浮游生物为食。
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