P-r interval
[医] P-R间期(心电图)
🧩 词语组成解析
🗣️ 情景例句
Room service. May I help you?
客房服务部，需要我为您效劳吗？
Is there a public phone near here?
这附近有公用电话吗？
One day a week he would spend the whole day in silence.
每周有一天他是在沉默无语中度过的。