让对方“小点声”常见这两个表达：1️⃣keep your voice down 2️⃣lower your voice

"Keep your voice down" 和 "lower your voice" 都是用来告诉某人小声点、压低音量。他们的区别在于"keep your voice down"可能含有一种持续保持低音量的请求，用于提醒他人，而"lower your voice"更多是在瞬间让对方降低音量。

Please keep your voice down; people are trying to sleep.

请小声点，别人正在睡觉。

Could you lower your voice? It’s very loud in here.

你能把声音放低一点吗？这里声音太大了。