annual herbˈænjuəlhə:b短语⁸⁴³²⁰⁺⁸ 基本例句 一年生草本 Flower size variation at the inflorescence and individual levels and its trade-off with flower number were evaluated in annual herb, Polygonum hydropiper Polygonaceae. 探讨一年生植物水蓼花大小在花序上和个体上的变化及花大小与花数量的权衡关系。 dictall