Four weeks after conception, the embryo that would become Corina was producing half a million neurons every minute.
怀孕四周后，将会变成科瑞娜的胚胎每分钟会50万个神经细胞。
But it tests fewer than half of the chromosomes in an embryo, so it's not a perfect indicator of overall embryo health and it hasn't been all that useful for most women.
但是它只能检测胚胎内不到一半的染色体，因此PGD对预测整个胚胎的健康情况并不理想，而且它对于大多数女性而言并不实用。
Full quality of basic media were more suitable to callus subculture than half quality of that. But MS basic medium was advantageous to plant regeneration of mature embryo.
全量培养基比半量培养基更适合愈伤组织继代；MS基本培养基有利于种胚植株再生。
Spemann then conducted another experiment, where this time, he removed a few cells from the back half of one embryo and transplanted them into the belly half of a different embryo.
Spemann这时进行了另一项实验，他将一些背部细胞从胚胎中移出植入腹部的胚胎。
Spemann then conducted another experiment, where this time, he removed a few cells from the back half of one embryo and transplanted them into the belly half of a different embryo.
Spemann这时进行了另一项实验，他将一些背部细胞从胚胎中移出植入腹部的胚胎。
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