Inogen
[医] 肌受缩原
🗣️ 情景例句
Would you like to stay for dinner?
可以留下来吃饭吗？
Two or three of them look familiar.
我认识他们中的两三个。
Ethanol is more effective at a concentration of 50-70 percent;
乙醇的浓度为50％至70％时比较有效，