viability
生存能力,發育能力
vi·a·bil·i·ty /ˌvaɪəˈbɪlətɪ/ 名詞
Vi·a·bil·i·ty n. The quality or state of being viable. Specifically: --
(a) Law The capacity of living after birth.
(b) The capacity of living, or being distributed, over wide geographical limits; as, the viability of a species.
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viability
n 1: (of living things) capable of normal growth and development
2: capable of become practical and useful