“胚珠”造句

初生合点吸器沿着胚珠的维管组织分支.
The primary chalazal haustorium ramifies around the vascular tissues of the ovule.

大多数种子的形成是从胚珠受精开始的.
Seed development in most instances commences following fertilization of the ovule.

只有少数林木可以从未授粉的胚珠发育成有活力的种子.
Only a few forest tree species can develop viable seed from unpollinated ovules.

• #胚珠