Embryos at 4 ~ 8 cell stage showed higher survival rate and lower abnormal embryo rate than embryos at multicellular stage or early gastrula stage when radiated at the same dose and dose rate.

在相同剂量和剂量率下，处于4 ~ 8细胞期的胚胎存活率比多细胞期和囊胚早期高，而畸形率低。

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As for Italy, its glory radiated in the 15th century when the Grand Canal teemed with sailing vessels by the dozen.

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