基本解释種源同根派生 provenances相关词英汉例句Provenances selection and afforestation technique of Fraxinus mandshurica Rupr.水曲柳優良種源選擇及造林技術。An approach to seedling growth rhythm from different provenances of Pterocarya stenoptera C.DC.楓楊種源苗期生長節律的初步研究。provenances更多例句