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...
She beseeched him to cut his drinking and his smoking.她哀求他戒掉烟酒。"Please stay and read to me, mummy," he beseeched.“求求你留下来给我读点东西吧，妈妈，”他央求道。They beseeched him to go at once.他们请他马上就去....