Perchlorethylene
n. [化]全氯乙烯
🗣️ 情景例句
Have you gotten over your cold?
你感冒好了吗？
You're hopeless!
你真是没救了！
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，