🧩 词语组成解析
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
guinea
[['gini]]
n. 几内亚
🗣️ 情景例句
Thank you, Dr. Stewart.
谢谢你，Stewart大夫。
Oh, really? Where did you go?
哦，真好？去哪儿了？
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，