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1. But, of 277 udder cells he fused with egg cells, only 30 began to develop into embryos.
    但是,在他将卵细胞与之结合的277个乳腺细胞中,只有30个开始长成胚胎。

2. He found a way to take an udder cell and make it grow into a new cloned lamb.
    他找到了提取乳腺细胞并把它培育成一只新的克隆羊的方法。

3. Once cells have specialized, on their way to becoming skin or eye or udder cells, most of the genetic instructions to make a full being are turned off.
    一旦细胞特化,进入成为皮肤细胞、眼睛细胞或乳腺细胞的过程,大部分长成完整个体的基因指令就被关闭。

4. Instead of using early-stage embryo cells, Wilmut used cells from the udder (乳腺) of an adult sheep.
    威尔莫特使用的不是初期胚胎细胞,而是从一只成年绵羊的乳腺提取的细胞。