Her answer was given in a low voice.

她的回答是用低声说的。

Please speak in a low voice.

请你小声说话。

She told me a secret in a low voice.

她小声地告诉了我一个秘密。

He whispered a secret in a low voice.

他用低声说了句悄悄话。

She spoke in a low voice in the library.

她在图书馆里低声说话。

He answered in a low voice on the phone.

他在电话里低声回答。

We must speak in a low voice in the library.

我们在图书馆里必须小声说话。

He answered the question in a low voice in class.

他在课堂上小声回答问题。

The children talked in a low voice during the class.

孩子们在课堂上低声交谈。

The children are playing in a low voice in the room.

孩子们在房间里小声地玩耍。