在胚胎发育的很早期阶段，多数步骤都会在一个极短的时间内发生。
Much of this process happens during a surprisingly short time and at very early stages of embryonic development.
雌蚕高温干燥条件的敏感性，主要发生在胚胎发育至后期阶段。
The sensitive period was at late stage during the embryo development.
雌蚕高温干燥条件的敏感性，主要发生在胚胎发育至后期阶段。
The sensitive period was at late stage during the embryo development.
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