“请立即将这封信寄出去。”“你们应该保持宿舍整洁干净。”“他们正在研究买房的可能性。”翻译成英文

请立即将这封信寄出去 Please send this letter immediately.

你们应该保持宿舍整洁干净 You should keep your dorm organized and clean.

他们正在研究买房的可能性 They are discussing the possibility of buying a house.

Send out this letter immediately,please.
You should keep your dormitory clean.
They're researching the possibility of purchasing a house.

请立即将这封信寄出去 Send the letter immediately, please.

你们应该保持宿舍整洁干净 Keep the dorm tidy.

他们正在研究买房的可能性 They are studying the possibility of affording a house.
(注明：study有仔细研究的含义，牛津字典中的第三个释义；买房子是件大事,用afford这个表示“支付的起”这个含义比较好)

send out this letter now .

keep the room clean and tidy.