三下乡a program under which officials,doctors,scientist and college students go to the countryside to spread scientific and literacy knowledge and offer medical service to farmers
三角恋 triangle.
三十而立A man should be independent at the age of thirty.At thirty,a man should be able to think for himself
三天打鱼两天晒网a difficult course in so far as it involves a general knowledge of all branches of engineering
三只手three hands
三人行必有我师Two heads are always better then one
三字经three character primer
三下不烂之舌 a smooth-tongued hypocrite.
三顾茅庐ask ab.to take up a resposible post repeatedly
三头六臂three heads and six hands
三下五除二hurriedly chip the frost off the windshield
三足鼎立a firm foothold in the Northwest.