从化石记录中可以了解到一些已经灭绝、但已经完全变成海洋生物的鲸目动物。
Extinct but already fully marine cetaceans are known from the fossil record.
这项被称之为“宏基因组”(也有人称其为“元基因组”)的新技术极大地拓展了人们对于海洋(以及其他许多地方，比如温泉和动物的内脏)中的微生物的了解和认识。
Metagenomics, as the new technique is known, has vastly extended knowledge of what bugs live in the sea-and in many other places, from hot springs to animals' guts.
对于生活在完全黑暗的大西洋深处的海洋动物，我们的了解是非常之少的。
Little is known of the Marine animals that live in total darkness in the deepest part of Atlantic.
这项被称之为“宏基因组”（也有人称其为“元基因组”）的新技术极大地拓展了人们对于海洋（以及其他许多地方，比如温泉和动物的内脏）中的微生物的了解和认识。
Metagenomics, as the new technique is known, has vastly extended knowledge of what bugs live in the sea—and in many other places, from hot springs to animals' guts.
这项被称之为“宏基因组”（也有人称其为“元基因组”）的新技术极大地拓展了人们对于海洋（以及其他许多地方，比如温泉和动物的内脏）中的微生物的了解和认识。
Metagenomics, as the new technique is known, has vastly extended knowledge of what bugs live in the sea—and in many other places, from hot springs to animals' guts.
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