牙医建议他们的病人定期刷牙并用洁牙线剔牙，防止蛀牙。

Dentists advise their patients to brush and floss regularly to prevent their teeth from decaying.

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牙医建议他们的病人定期刷牙并用洁牙线剔牙，防止蛀牙。

Dentists advise their patients to brush and floss regularly to prevent their teeth from decaying.

youdao