threestepadj.三级的
threenum.三n.三;三个adj.三个的
three-terminal element三端元件
three-dimensional wall三维墙
Three-banded Rosefinchn.斑翅朱雀
Three Frame Differencing三帧差
three-tiered structure三层体系
three room and two halls三室两厅
three-wattmeter method三瓦特计法
three bench construction三台阶施工
Three-level structures三级构造
three carbon tautomerism[化] 三碳互变异构现象