thirtiethKK [ˋθɝtiəθ] /ˈθɝtiəθ/发音形容词1第三十、第三十个She is celebrating her thirtieth year with the company.她正在庆祝进入公司的第三十年。2三十分之一的He finished just a thirtieth of a second behind the winner.他只以三十分之一秒之差落后冠军。名词1三十日、三十号多与 the 连用The meeting has been moved to the thirtieth of next month.会议已改到下个月三十号。2第三十个多与 the 连用This is the thirtieth in a long series of delays.这是一连串延误中的第三十次。3三十分之一Each investor owns a thirtieth of the building.每位投资人各拥有这栋建筑的三十分之一。用这个字练口说→