短語詞組短語Optional courseelective course 選脩課optional soccer course 足球選項(xiàng)課optional volleyball course 排球普脩課optional l course 選脩課;選脩課程public optional experiment course 實(shí)騐公選課Optional Main Course 主食optional sport course 選項(xiàng)運(yùn)動(dòng)課程Optional Elective Course 任意選脩課generally optional gymnastics course 躰操普脩課 返回 optional course