A complex sentence is a group of words which expresses two or more unified thoughts, one of which is the main or principal thought dependent on it one or more subordinate thoughts. 老师好!这里的dependent on it中的it是不是多余了?
为什么[l]和[r]遇到[s][p][t][k]之后就从voiced变成voiceless了?In English,the sounds [l] and [r],which are usually voiced,are voiceless when they follow [s][p][t][k],as in slay,pray,tray,clay. 这是为什么?
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。...