48个音标怎么读视频答:字母R在单词中的发音r/r/red, rest, rat, read, agree, free, reach, threadrr/r/berry, carry, hurry, narrow, arrow字母S在单词中的发音star, smile, spring, school, sweet, books, maps, helpssk/sk/, sp/sp/, sq/sk/, st/st/ask, desk, grasp, cast, list, rest, mosquitos/z/gosling,...