Whippletree
n. 车前横木
✅ 同义词
🗣️ 情景例句
He was more than helpful.
他不仅仅是帮忙。
It was our pleasure.
这是我们的荣幸。
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，