基本解释种源同根派生 英汉例句Provenances selection and afforestation technique of Fraxinus mandshurica Rupr.水曲柳优良种源选择及造林技术。An approach to seedling growth rhythm from different provenances of Pterocarya stenoptera C.DC.枫杨种源苗期生长节律的初步研究。