bureaun.局;办事处;(带抽屉的)写字台
burdenn.负担;责任;装载量;主题;[音乐]副歌v.使负重;装载;烦扰
burdensome adj.累赘的;恼人的;艰难的
"the burdensome task of preparing the income tax return""my duties weren't onerous; I only had to greet the guests""a taxing schedule"