当面是人，背后是鬼dānɡ miàn shì rén bèi hòu shì ɡuǐ

义同“当面一套，背后一套”。same as“当面一套，背后一套”。

• undermentioned
• undermine
• underneath
• undernourished
• underpants
• underpass
• underpay
• underpin
• underpopulated
• underprivileged
• underproduction
• underquote
• underrate
• underscore
• under-secretary
• undersell
• undersexed
• undershoot
• underside
• undersign
• undersized
• underslung
• understaffed
• understand
• understate