在《PONS词典》中的词汇
有关生物学的词语（Klett）
megagametophyte [ˌmeɡəɡæmiˈtəʊˌfaɪt], embryo sac 名词
embryo sac cell 名词
有关生物学的词语（Klett）
单语范例（未经PONS编辑处理）
In flowering plants the gametophytes are very reduced in size, and are represented by the pollen and the embryo sac.
en.wikipedia.org Some of the nuclear cells surrounding the embryo sac start and dividing protrude into the embryo sac and develop into embryos.
en.wikipedia.org In angiosperms, the megagametophyte is reduced to only a few nuclei and cells, and is sometimes called the embryo sac.
en.wikipedia.org Its cells are polyploid (triploid or pentaploid, depending on the embryo sac type).
en.wikipedia.org In flowering plants, the megagametophyte (also referred to as the embryo sac) is much smaller and typically consists of only seven cells and eight nuclei.
en.wikipedia.org