研究人员一度以为，只有单细胞生物，如原核生物和原生动物，才能在深海缺氧环境中生活。
Researchers had thought that only single-celled organisms such as prokaryotes and protozoa could live in the oxygen-deprived environments of the deepest ocean.
在这个公园中生活着六十多种野生动物。
More than sixty kinds of animals live in the park. Deer are very common.
在这个公园中生活着六十多种野生动物。
More than sixty kinds of animals live in the park. Deer are very common.
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