不卫生的习惯
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unhygienic habit
以上为机器翻译结果，长、整句建议使用 人工翻译 。
For example, a young nail-biter whose mother told her that the habit was unhygienic and might pose a health risk decided to examine whether more bacteria were removed during hand washing with soap or hand sanitizer.
WHITEHOUSE: Office of Science and Technology Policy Blog
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