ovuletube

例句：

1. 1.In plant reproduction, the ovule tube is a structure that connects the ovule to the style during pollination.
   在植物繁殖过程中，胚珠管是一个结构，它在授粉期间将胚珠与花柱连接。
2. 2.The ovule tube plays a crucial role in the development of the embryonic axis and the formation of the cotyledons.
   胚珠管在胚胎轴的发展和叶鞘的形成中起着至关重要的作用。
3. 3.During fertilization, the spermatozoa enter the ovule tube and travel through it to reach the egg cell.
   在受精过程中，精子进入胚珠管并穿过它到达卵细胞。