1·The root hair cell wall invaginates at the point of contact.
在接触点上，根毛细胞壁内凹。
2·The nuclear membrane invaginates and lysosomes are internalized.
核膜内陷，于是溶酶体被内在化。
3·The nuclear membrane invaginates and lysosomes are internalized .
核膜内陷，于是溶酶体被内在化。
4·The intima invaginates into each secretory cell and forms a duct which is surrounded by duct cells.
内膜内陷到各个分泌细胞间，形成一个外面由管状细胞包裹的管腔。