tenable environment耐受环境
tenable a无懈可击的;可保持的;站得住脚的
tenable factors成立要件
tenable unjustified无懈可击的
tenable factor成立要件
tenable conditions成立要件
ADJ（形容词） If you say that an argument, point of view, or situation is tenable, you believe that it is reasonable and could be successfully defended against criticism. 合理的; 讲得通的
This argument is simply not tenable.
这种论点简直一点道理也没有。