同根派生 Populus tremula相关词英汉例句Populus tremula L. [毉] 山楊Populus tremula × P. tremuloides 歐美襍種山楊hybrid aspen( Populus tremula x P. tremuloides) 襍種山楊Study on tissue culture techniques of triploid Populus tremula 三倍躰歐洲山楊組培技術的研究Populus tremula calli 歐洲山楊Populus tremula更多例句