你怎么这么傻在你面前才会a
[nĭ zĕn me zhè me shă zài nĭ miàn qián cái huì a]
A colloquial saying translated loosely to ‘How can you be so foolish? Only in front of you I could do such a thing’. It refers to a scenario in which one behaves foolishly only when they're in front of certain individuals or in a particular context.