double X双X(染色体)doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double inage重影double pages双页书名double pumps投篮前两个假动作double edger双裁边锯,双圆锯裁边机doublelenessn.二倍double slice双堰板double prism双棱镜double force双力double spike同位素稀释剂double large双大裁