Mans warm blood makes it difficult for him to live long in the sea without some kind warmth.
人的血液是热的，如果得不到一定的热量，人就难以长期在海水中生活。
Mans warm blood makes it difficult for him to live long in the sea without some kind warmth.
人的血液是热的，假如得不到一定的热量，人就难以长期在海水中糊口。
Mans warm blood makes it difficult for him to live long in the sea without some kind warmth.
人的血液是热的，假如得不到一定的热量，人就难以长期在海水中糊口。
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