🗣️ 情景例句
Sam, get Mr. Levine at Toytown Stores
Sam，给Toytown Stores的Levine先生
He is in difficulty in his business.
他在事业上遇到困难了。
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，