短语词组短語heavy social burden 社會負擔沉重heavy calculation burden 計算量大heavy metal burden 重金屬汙染負荷To Bear heavy Burden 身肩重任no heavy burden 不負重too heavy burden 負擔過重shoulder heavy burden 分擔重擔a heavy macro -burden 大口逕宏觀稅負 返回 heavy burden