Most forms of the common cold and flu are caused by viruses.

大部分的普通感冒和流感都是病毒引起的。

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Eating almonds can help the body to fight off viral infections such as the common cold and flu, according to new research, the Daily Telegraph reported.

英国《每日电讯报》消息，一项新的研究表明，吃杏仁有助于人体战胜普通感冒和流感等多种病毒感染。

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What's more, farmers didn't know the difference between common cold and flu; they didn't understand that the flu was much more lethal than the common cold.

而且，农民也分不清普通感冒和流感，他们不知道流感比普通感冒致命得多。

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Voice changes also occur with viral and bacterial infection, like the common cold or flu, and are one of the characteristics of heavy smoking.

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But antivirus drugs, aimed at viral, rather than bacterial, invaders--HIV, herpes, hepatitis, flu, the common cold--have been harder to come by because viruses are harder to outwit and tame.

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