A checkpoint has two purposes: (1) to establish data consistency, and (2) enable faster database recovery.

一个检查点有两个目的：(1)确保数据一致性，和(2)更快的数据库恢复。

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PD-L1 immunohistochemistry may have some role in the immunophenotypic differential diagnosis of tumors and pinpointing potential candidates for anti-PD-1/PD-L immune checkpoint therapy.

PD-L1免疫组化可能在肿瘤免疫表型鉴别诊断、精确筛选抗PD-1/PD-L免疫检查点治疗方面有一些作用。

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Chk2 is the mammalian orthologue of the budding yeast Rad53 and fission yeast Cds1 checkpoint kinases (1-3).

Chk2是哺乳动物中和芽殖酵母Rad53和裂殖酵母Cds1检验点激酶同源的蛋白（1-3）。

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Screening procedures drew 1, 960 complaints since January 2010, and security checkpoint processing time got 2, 484 complaints since then.

CNN: How much do we really hate the TSA?

But the Barry family isn't flying again until they're confident their kids -- both of whom have Type 1 diabetes -- will have pumps that work beyond the checkpoint.

CNN: How much do we really hate the TSA?