Contrastive
a. 对比的
✅ 同义词
🗣️ 情景例句
Hi, John, how's it going?
嗨，约翰，你好吗？
I'm very much obliged to you.
非常感谢您。
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，