If scientists are working with a mixture of two cell types, for example a and B, they end up with many AA and BB pairings, as well as the desired AB match.
如果科学家处理的是两种类型的细胞的混合物，例如A和B，他们最终会以AA和BB配对，以及所需的AB配对。
The influence of the hydrolysis of acetacetic ether (AA) on B-Z oscillating reaction is studied.
研究了乙酰乙酸乙酯（AA）不同程度的水解对B-Z振荡反应的影响。
Their whole inventory is like our AA, A, & B grade loans.
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