I am writing to you to voice my opinions.

此刻我正给你写信来表达我的看法。

in a low / loud voice

低/高声地

I didn’t recognize her voice on the telephone.

在电话里我没有听出她的声音。

They were shouting at the top of their voices.

他们正在扯着嗓子大声喊叫。

This programme gives ordinary viewers a chance to make their voice heard (= express their opinion sothat people notice it).

这个节目给了普通观众一个表达心声的机会。

Mary was silent during the early part of the discussion but finally she gave voice to her opinion on the subject.

在讨论的前期，玛丽很沉默，但最后她还是表达了对这个话题的看法。

the active / passive voice

主动/被动语态