还有像不能飞行的鸟类的株状的翅膀，还有人类皮肤的毛发就和有毛皮的哺乳动物类似，这些都是我们有共同的祖先的证据。
Vestiges such as the stumpy wings of flightless birds, and the hairs that prickle on human skin just like the rising hackles on furry mammals, are further testimony to our Shared origins.
用新霉素类似物(G418)筛选出阳性克隆，并用流式细胞术进一步筛选出高效表达克隆，建立稳定高效表达CHO细胞株。
The positive clones were selected by G418, and highly expressing clones were more selected by flow cytometry, and get stable highly expressing CHO cell lines.
类似的癌症干细胞早前在白血病、乳癌、中枢神经系统细胞株和胃肠道肿瘤中鉴定出。
Similar cancer stem cells have been previously identified in leukemia and breast cancer and in cell lines of central nervous system and gastrointestinal tumors.
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