Peripericarditis
心包周炎
🗣️ 情景例句
Good-bye.
再见。
Be practical!
实际一点吧！
About once a month. Not too often, because neither of us has much time. We both have too much work to do.
大约每月一次。不太经常写信，因为我俩的时间都很紧。我们都有做不完的事。