A single archesporium differentiates immediately below the nucellar epidermis, it functions directly the megaspore mother cell.孢原细胞处于珠心表皮之下, 直接起大孢子母细胞的功能.Megaspore tetrad is linear. The chalazal megaspore develops into a...
The prisoner's limbs flailed violently because of the pain.那囚犯因为疼痛,四肢剧烈地抖动着.He gave a choked cry, flailed his arms wildly for a moment, and then went over the edge.他闷哼了一声，手臂乱挥了几下，就从边上摔了下去。He flailed about madly with...