Please be quiet. 请安静一点. Please keep it down. 说话请小声一点. Could you lower your voice?你能不能把声音降低一点? You're too loud. 你太大声了. You're too noisy. 你太吵了. You're disturbing everybody.你打扰到大家了. Sorry to say that. 很抱歉我那么说. I hope you don't mind. 我希望你不要介意. Please don't take offense. 请不要生气.
