R-r interval
[医] R-R间期(心电图)
🧩 词语组成解析
🗣️ 情景例句
Try to think in English whenever possible.
尽可能用英文思维。
What's done can't be undone.
无可挽回。 泼水难收？
Newspapers and magazines offered the family huge sums for the exclusive rights to publish stories and photographs.
报纸、杂志出高价向他们购买文字、图片的独家报道权。