常見例句

用作名詞 (n.)

• The nucellus is usually degraded and absorbed as the endosperm develops.
  珠心通常在胚乳發(fā)育時被分解和吸收。
• The region of an ovule that is opposite the micropyle,where the integuments and nucellus are joined.
  合點珠孔對面的胚珠內結合珠被和珠心的一個區(qū)域。
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