The little boy who arduously puts up two heavy boxes and three bottles is my brother.这个费力地举起2个沉重的盒子和3个瓶子的小男孩是我弟弟。名词:boy \boxes \bottles \brother动词:lifts\ is介词:up形容词:little\heavy副词:arduously代词:who\my连词:and 冠词:the数词:two\three