Control sample, including the button controls, combo box controls, such as edit box.

控件范例, 包括按钮控件, 组合框控件, 编辑框等.

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Wallets containing the charity cards and the control sample were least 20 and per cent respectively.

放有慈善卡的钱包以及对比组的钱包归还率最低,分别20%和15%.

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