the fact that something can be done and can be successful 可实施的；切实可行的 There are doubts about the commercial viability of the newspaper. 对报纸的商业可行性存有疑问。
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biology 生物 the fact that something is capable of developing and surviving independently 可生存的；能独立发展的；能独立生存的；可生长发育的 the viability of the fetus 胎儿的生存能力