most conducive to a favourable outcome; best
有最佳效果的;最佳的
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the optimum childbearing age .最佳生育年龄。
the most favourable conditions or level for growth, reproduction, or success
(生长、繁殖或成功的)最佳条件,最适度。
"late 19th cent.: from Latin, neuter (used as a noun) of