Trit.
[医] 研制, 研磨
🗣️ 情景例句
Please send me a post card.
记住给我寄名信片。
This is a TV set.
这是一台电视机。
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，