triploid Populus tomentosa 基本例句 三倍体毛白杨 Studies on the Pulping Properties of Triploid Clones of Populus tomentosa Carr.三倍体毛白杨纸浆材制浆特性研究。 Gamete fertility and morphological variations in offsprings of triploidclones Populus tomentosa.三倍体毛白杨配子育性及其子代形态变异研究。