threeleveladj.三级的threenum.三n.三；三个adj.三个的three-dimensionally concept立体构成Three Gorges left power plant三峡左岸电厂three-component coefficient三分力系数three-month-old stalemate长达3个月的僵局threephase kilowatthour meter三相电度表Three-tier C/S Structure三层C6结构Three Lanes and Seven Streets三坊七巷Three ways to express meaning三言Three-striped Dwarf Cichlidn.三带短鲷(丽鱼科)Three-dimensional uhrasound三维超声