Like radio buttons, list controls are powerful tools for simplifying interaction because they eliminate the possibility of making an invalid selection.

和单选按钮一样，列表控件是简化交互功能的强大工具，因为它排除了做出错误选择的可能性。

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Homozygous tetraploid is a relatively balanced system, the continued selection is invalid.

纯合的四倍体是一个相对平衡的系统，继续选择是无效的。

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