No amount of cleaning will remove the severe staining left by tetracycline or systemic disease because these pigments lie inside the tooth; you'll have to take more aggressive measures against these.

不过洗牙次数再多也不能去除由于四环素或系统性疾病导致的牙齿深度着色，因为这些色素已进入你的牙齿内部，你需要采取更加积极地措施来对付它们。

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There was no significant difference between the results of Trypan blue staining in labeled and unlabeled cells.

标记细胞与未标记细胞的台盼兰染色结果无显著差异。

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Trypan blue staining showed that, the survival rate of the cells was above 90% in all the groups, and no cytotoxicity was observed.

台盼兰染色显示各组细胞存活率均在90%以上，未见细胞毒性。

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