“胚珠”造句
2024年06月20日 10:45:30
初生合點吸器沿著
胚珠的維管組織分支.
The primary chalazal haustorium ramifies around the vascular tissues of the ovule.
大多數(shù)種子的形成是從
胚珠受精開始的.
Seed development in most instances commences following fertilization of the ovule.
只有少數(shù)林木可以從未授粉的
胚珠發(fā)育成有活力的種子.
Only a few forest tree species can develop viable seed from unpollinated ovules.