Question

那位大虾帮忙分析一下句子成分及翻译一下句意，先谢过了？

The flu is believed to be caused by viruses that like to reproduce in the cells inside the human nose and throat.

Answer 1

The flu主语
is believed 谓语（被动语态）
to be caused by viruses that like to reproduce in the cells inside the human nose and throat.宾语（被动式不定式短语），其中that like to reproduce in the cells inside the human nose and throat.做virus的定语从句。
译：流感被认为是由喜欢在人体鼻子及咽部细胞中复制的病毒引起。

Answer 2

人们认为流感是由喜欢在人的鼻子和咽喉细胞中繁殖的病毒所引起的。

Answer 3

流感被认为是繁殖的病毒所引起的细胞内的人的鼻子和喉咙。