Elitism and 2-tournament selection are used to expand the selection of chromosomes, so that the ones with better fitness have more chances to be selected.

改进后的算法在选择操作时，采取了精英个体保留策略和锦标赛方法，扩大染色体的选择范围，加大了适应度好的染色体被选中的概率；

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In the table selection dialog window, expand the TXTANL schema, and select the JOBS table.

在表选择对话框窗口中，展开TXTANL模式，然后选择jobs表。

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Small dots appear at either end of the selection, allowing you to expand or contract the selected section of text.

选中文本的两端都有小点显示，你可以在此基础上扩展或是缩减选中文本的范围。

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Organizations seeking to expand health coverage were quick to praise the selection.

NPR: Daschle Accepts HHS Post, Democratic Officials Say

This may seem a cynical ploy to expand their business, but some compulsion is needed to get around the selection problem.

ECONOMIST: Reforming American health care