把这一句，留给此刻的你
Adult stem cells are also problematic, as they are difficult to identify, purify and grow, and simply may not exist for certain diseased tissues that need to be replaced.
成体干细胞也有问题，因为它们很难识别、纯化和生长，而且可能根本不存在某些需要替换的病变组织。
把喜欢的一句，带在身边
做成一张壁纸
16 种意境 · 9:16 竖屏 · 1440 × 2560 高清图片