Synchronized embryogenic cultures at different developmental stages were obtained by controlling 2,4-D concentration and developmental time.

通过对2，4-D浓度及生长发育时间的控制获得了高度同步化的各发育阶段体胚材料。

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The results indicated that the receptors of estrogen, androgen and progestogen existed in oogonia and oocytes of different developmental stages.

结果表明，不同发育时期的卵原细胞和卵母细胞中都存在雌激素、雄激素和孕激素受体。

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A regulated gene expression system would offer the unique opportunity to study the gene physiological functions at different developmental stages.

如果获得一种可以特异调控基因表达的系统，对于研究某一基因在各个不同发育时期的功能会有很大的帮助。

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To further complicate matters, there is new information at different developmental stages of our kids' lives, and through various life events (a new sibling, moving, an illness), as well as appropriate approaches for each child's personality and learning style.

CNN: A different kind of parenting resolution