但我还没有看到一个可以使父母或祖父母闭口不言的策略。
But I have yet to see a ruse that can shut up a parent or grandparent.
一半人被要求大声重复他们要找的东西，另一半人则要闭口不言。
Half were instructed to repeat out loud what they were looking for and the other half kept their lips sealed.
十亿美元项目中拿出极小部分都可以在贫穷的国家让许多人闭口不言。
A tiny percentage of a billion-dollar project can buy a lot of acquiescence in poor countries.
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