1. A minute structure in seed plants, containing the embryo sac and surrounded by the nucellus, that develops into a seed after fertilization. 
   胚珠种子植物的一个小的结构，含有胚囊并被珠心所包围，施肥后长成种子
2. fertilization of a second ovum after a pregnancy has begun; results in two fetuses of different ages in the uterus at the same time. 
   不同排卵期排出的两个或多个卵连续受精；结果是同一子宫内存在有不同龄的胚胎。
3. spread manure, as for fertilization. 
   施撒肥料，为了肥沃。
4. fertilizers and fertilization in ancient China 
   中国古代肥料和施肥
5. The production of fruit without fertilization. 
   单性结实未以受精作用结出果实

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• 1. 受精后
  after exposure 后期爆光; 后期曝光; 二次曝光...after fertilization 受精后...after fertilizer 追肥
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