burden /ˈbə:dn/  n. ［c］ & ［u］ 担子，负担：a burden of sorrow 重重的伤心事；beasts of burden 驮兽(牛、马等)；heavy burden for sb. 对于某人说来太重的负担；take up (shoulder) the burden 挑起(肩负)重任；drop one’s burden 放下责任