这种形式的肺癌肿瘤扩散速度快，所以通过手术移除肿瘤的可能性极小。
With this form of lung cancer, tumours spread quickly so it is rarely possible to remove the tumours surgically.
动物实验表明，在皮肤和黏膜局部施用总量约1g的亚硝胺时，会诱发局部或全身性的肿瘤，尤其是肝脏肿瘤。
Animal experiments showed that local application of the skin and mucous membrane of about 1g total N-nitrosamines, it will induce local or systemic tumors, especially liver cancer.
Craig的团队鉴定的这种蛋白可以通过去除并分解肿瘤细胞表面的一种侵袭性酶而抑制肿瘤细胞的扩散。
The regulatory protein identified by Dr Craig's team inhibits the spread of cancer cells by removing and breaking down an invasive enzyme on the surface of cancer cells.
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