P-r interval
[医] P-R间期(心电图)
🧩 词语组成解析
🗣️ 情景例句
With a little help from the ASPCA,
可以请ASPCA帮忙，
I hope he will meet me at the airport.
我希望他能到机场接我。
Neither was I surprise when the train stopped at Widley, a tiny station a few miles along the line.Even a mighty express train can be held up by signals.
火车开出几英里即在一个小站威德里停了下来。对此，我不觉得奇怪，因为即便是特别快车也可能被信号拦住。