短语词组短语seedling -age-type 苗龄型elasticity of seedling age 秧龄弹性young seedling age variety 短秧龄品种Transplanting seedling age 移栽秧龄different seedling age 不同苗龄seedling age at transplanting 不同移栽秧龄proper seedling age 适宜秧龄 返回 seedling age