6 - Picking your nose: the unappealing but common habit of ingesting 'nasal detritus' offers almost no nutritional benefit, so why do a quarter of teenagers do it, on average four times a day?
6-挖鼻孔：这个讨人嫌却又很普遍的行为并无任何益处，那么为什么近1/4的青少年要这么做呢？ 而且平均每天要挖四次。
6 - Picking your nose: the unappealing but common habit of ingesting 'nasal detritus' offers almost no nutritional benefit, so why do a quarter of teenagers do it, on average four times a day?
6-挖鼻孔：这个讨人嫌却又很普遍的行为并无任何益处，那么为什么近1/4的青少年要这么做呢？ 而且平均每天要挖四次。
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