大部分的普通感冒和流感都是病毒引起的。

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

youdao

普通感冒和流感都是由病毒引起的。

The common cold and the flu are both caused by viruses.

youdao

猪流感和普通感冒的症状十分相似。

The symptoms are quite similar between regular flu and swine flu.

youdao

流感和普通感冒是不一样的。

That is not flu. That is cold.

youdao

流感和普通感冒是不一样的。

That is not flu. That is cold.

youdao