That girl tapped her fingers on the desk impatiently 那个女孩不耐烦地用手指轻扣桌面。
2.
Meanwhile we are continuing our therapeutic cloning experiments to generate cloned or parthenogenetically produced human embryos that will yield stem cells . scientists have only begun to tap this important resource 另一方面，我们也会继续进行我们的医疗复制实验，制造可产生干细胞的复制人胚胎或孤雌人胚胎。总而言之，科学家才刚轻扣这个宝库的大门呢！
