The density of GH cell increased in early embryo and decreased gradually with fetal ages in late embryo.
细胞密度胚胎早期升高，以后随胎龄增长逐渐下降。
The density of GH-cells increases in early embryo and decreases gradually with fetal ages in late embryo.
GH细胞密度，胚胎早期升高，晚期随胎龄增长逐渐下降。
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。
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