Most retailers will roll out changes, such as POS upgrades, in stages. Winners will systematically pilot, A-B test, and share lessons across stores.

大多数零售商会采取变革措施，比如分阶段升级POS机，并在之后的过程中不断进行比较测验，同时在店家之间进行经验分享。

youdao

I got (a) B minus (B-) in the test.

这次考试我得了个B-。

《牛津词典》

If possible, run your A/B test over at least one cycle to get more accurate numbers.

如果可能，请在至少一个周期内运行酸/碱比率测试以获得更准确的数字。

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You'll need to have a skin test for tuberculosis, a chest X-ray and a test for hepatitis B before taking infliximab.

CNN: Ulcerative colitis

Kallon, who is expecting the hear the results of the test on his 'B' sample very soon, denied being guilty of using a performance-enhancing substance.

BBC: SPORT | Football | African | Kallon plays for S'Leone