当一分类单元面临即将绝灭的机率非常高。
极危物种 critically endangered ; Critically endangered species
极危险的事 murther
极危险物质 Extremely Hazardous Substances ; EHS
极危重儿 Very critical diseased children
极危险 murther ; Touch and go
极危险的 touch and go ; malignant ; perilous ; desperate
极危种 critical species
南极危点病毒 Precarious Point virus
极度危险 Samaja opa snaja ; Dangerous ; Extremely Dangerous ; Extreme Risk
The results of assessment showed that the number of critically endangered species was 6, the number of endangered species 15, vulnerable species 39, near threatened species 43, Safe species 143.
结果表明：①保护区有极危种6种，占总数的2.4％；濒危种15种，占总数6.1％；易危种39种，占总数的15.9％；近危种43种，占总数的17.5％；安全种143种，占总数的58.1％。
参考来源 - 天津八仙山自然保护区植物多样性及其保护研究·2,447,543篇论文数据，部分数据来源于NoteExpress
这起悲剧事故导致一头被列为极危物种的大猩猩死亡，我们都十分悲痛。
We are all devastated that this tragic accident resulted in the death of a critically-endangered gorilla.
墨西哥圣塔卡特·莱那岛响尾蛇在2007受威胁物种红色名录中被列为极危动物。
Mexico's Santa Catalina Island rattlesnake has been classified as critically endangered on the 2007 IUCN red List.
计算机病毒是危极计算机系统安全与完整的一种威胁。
A computer virus is one kind of threat to the security and integrity of computer systems.
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