Apexcardiogram
顶点心电图, 顶点心动描记曲线(图)
🗣️ 情景例句
Yes, I have my Passport. Here it is.
是的，我有护照。这就是。
This is it. That's $9.15, please.
到了。请付9。15美元。
when a significant number of people are living permanently in space.
如果有相当数量的人永久性地住在太空，