P-r interval
[医] P-R间期(心电图)
🧩 词语组成解析
🗣️ 情景例句
Follow me, please.
请跟我来。
A group of us went out to the theater last night.
我们一群人昨晚去外面到剧院。
'It may have begun already,' Susan answered.
“也许已经开演了呢，”苏珊回答说。