欢乐: gaiety, gladness, glee, merriment, pleasure, happy, joyous, gay...
功效: efficacy...
多: many, much, often, a lot of, numerous, more, in excess, how (to what extent), multi- when it means how...
成天: (coll.) all day long, all the time...
言行: words and actions, what one says and what one does...
一声不吭: to not say a word...
现实: reality, actuality, real, actual, realistic, pragmatic, materialistic, self-interested...
走廊: corridor, aisle, hallway, passageway, veranda...
倒闭: to go bankrupt, to close down...
治疗: to treat (an illness), medical treatment, therapy...
