观察对象所带有的（遗传）标记，依据这种标记可以获得生长优势，观察者依据这种标记可从混有不同基因型的群体中获得具有该标记的个体.
作者采用选择性标记的“即刻可释放”池-指那些即将在生理刺激中首先被释放的小泡来证实这个假设。
We tested this by selectively labeling the "readily releasable" pool, those vesicles released first during physiological stimulation.
由于LAP2肽可以融合在一定数量的不同蛋白上，该方法能够选择性标记在某些特定的亚细胞亚群的蛋白。
Because the LAP2 peptide can be fused to a number of different proteins, the method enables the selective labeling of certain subpopulations of proteins in specific subcellular compartments.
如果 IN 列表中包含参数标记符或主机变量，使优化器不能使用编目统计信息来确定选择性，就会出现这种情况。
This can occur if the IN list contains parameter markers or host variables which prevent the optimizer from using catalog statistics to determine the selectivity.
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