Symptoms included frequent dryness in the mouth.

症状包括经常口干。

《柯林斯英汉双解大词典》

It is transmitted via droplets, from the nose and mouth, during close and frequent contacts with untreated cases.

在与未经治疗的病例密切和频繁接触期间，该病通过来自口鼻的飞沫传播。

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While some studies have suggested that frequent use of cell phones causes increased risk of brain and mouth cancers, others have found no such links.

一些研究显示，经常使用手机会增加得脑部和口腔癌症的几率。有的研究却没发现两者之间有什么联系。

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Doctors advise using "simple but effective" hygiene measures such as frequent hand-washing, covering your mouth with a tissue when coughing and sneezing, and putting the tissue into a bin.

BBC: More call handlers for swine flu