短語詞組短語learning g difficulty 學(xué)習(xí)障礙pupil learning difficulty 小學(xué)生學(xué)習(xí)困難learning difficulty student 學(xué)習(xí)困難生degrees of learning difficulty 難度等級math -learning difficulty 數(shù)學(xué)學(xué)習(xí)困難physics learning difficulty students 物理學(xué)障生students with learning difficulty 學(xué)困生Reasons of learning difficulty 學(xué)習(xí)困難原因 返回 learning difficulty