Critically Endangered: 3, 325 (of these, 257 species are listed as "possibly extinct")?
严重濒危的物种：3325(其中有257个物种被列为“几乎已经灭绝”)？
Chinese scientists said they will continue to search for the rare white-flag dolphin although it is possibly extinct as a 38-day search failed to find any in the Yangtze River.
中国科学家称他们将继续搜索罕见珍贵的白鳍豚，尽管它们很可能已经灭绝，因为38天长江中的搜索没有任何发现。
From time to time people suggest that extinct animals like dinosaurs, can possibly be brought back to life through cloning.
不时地会有人提议，克隆技术将有可能使地球上已经消失的动物(如恐龙)复活。
Every discovery offers more clues as to how and why they became extinct, possibly owing to hunting by humans or more likely because of a changing climate.
研究人员发现了他们如何灭绝以及为什么他们灭绝的线索，可能是由于人类或更多的是因为气候变化，也可能是因为狩猎变多导致灭绝。
A report by the organization says, 27 birds species became extinct by the 18th century, 51 in the 19th century, 56 in the 20th century, and possibly 3 have been lost to date in the 21st century.
这一组织在一份报告中说，27种鸟在18世纪灭绝，51种在19世纪消亡，20世纪有56种鸟绝种，本世纪截至目前可能有3种鸟已消失。
A report by the organization says, 27 birds species became extinct by the 18th century, 51 in the 19th century, 56 in the 20th century, and possibly 3 have been lost to date in the 21st century.
这一组织在一份报告中说，27种鸟在18世纪灭绝，51种在19世纪消亡，20世纪有56种鸟绝种，本世纪截至目前可能有3种鸟已消失。
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