QQ is very popular in China, especially among the youths. Almost every youth has his own QQ number.

QQ在中国非常受欢迎，尤其是在年轻人间，几乎所有的年轻人都有自己的QQ号。

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Nowadayss the dating online is becoming a quite popular phenomenon among the youths, especially among the signal ladies and gentlemen.

此时网上交友是成为一个很流行的现象在年轻人中，尤其是在信号女士们，先生们。

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Earlier this month, Mr Bloomberg unveiled plans to require shops to hide cigarettes and tobacco products from public view, saying this would help to further cut the number of smokers, especially among the youths.

BBC: New York smoking ban in public places marks 10 years