NK cells kill their target cells by releasing cytotoxic granules in their cytoplasm directly into the target cell.

NK细胞通过释放胞质内的细胞毒颗粒直接进入靶细胞内，来杀死靶细胞。

Since the liver cells seem to be the main cells targeted in Reye's disease, the liver becomes one of the main organs affected.

由于肝细胞是瑞氏综合征的靶细胞，所以肝脏成为了主要的受累器官。

Today, we have medications that keep Parkinson's at bay, but they eventually stop working as the dopamine-producing cells die off, since drugs can't work if there's no target cell to act on.

如今，我们已经有了抑制帕金森病的药物，但随着产生多巴胺的细胞的死亡，药物最终会停止工作，因为如果没有作用的目标细胞，药物就无法起作用。