Talk quietly in the reading room in order not to disturb others.

在阅览室里，不要大声说话，以免妨碍别人。

We just have to talk quietly.

我们只能悄悄的讲话。

We need to work and talk quietly.

我们需要安静地工作和讲话。

And we have to talk quietly.

而且我们必须小声说话。

We usually talk quietly at the library.

我们在图书馆经常小声地说话。