1. The phrase not at all is sometimes used as a
polite response when someone thanks you. (《韦氏高阶英汉双解词典》p.54)
not at all这个短语有时候用作某人感谢你时有礼貌的应答方式。“Thank you for all your trouble.”“Not at all.”“谢谢,让你费心了。...
Railroads typically charge such"captive"shippers 20 to 30 percent more than they do when another railroad is comepting for the business.这句话比较级结构看不懂,求分析一下句子结构和意思
Carbon and oxygen taken together,one atom each,gives you the deadly gas carbon monoxide. taken together是过去分词作定语修饰carbon and oxygen吗?另外,one atom each是什么用法