threeleveladj.三级的threenum.三n.三；三个adj.三个的three-closed-loop control三闭环控制three-dimensional nonlinear三维非线性的Three axes rotational estrade三轴转台Three plus three makes six.三加三等于六。three-dimensional parabolic三维抛物体的Three - step extract method三步法three-wire system generator三线式发电机three hundred and forty three(=343) 三百四十三Three dimensions fluorescence三维荧光three thousand and sixty nine(=3069) 三千零六十九