However, in this area some local people deliberately chew betel nut in order to achieve the social prestige of darkly stained teeth, so the AD was understandably less than effective.

然而在这一地区，当地人有意咀嚼槟榔使牙齿变黑以赢得社会威望。因此可以理解该广告收效甚微。

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However, in this area some local people deliberately chew betel nut in order to achieve the social prestige of darkly stained teeth, so the AD was understandably less than effective.

然而在这一地区，当地人有意咀嚼槟榔使牙齿变黑以赢得社会威望。因此可以理解该广告收效甚微。

youdao