undov.解开；松开；取消undo harm消除危害undograph(自记)测波仪undousingn.不熄减undo last撤消前次操作undoubledadj.不再对折的；展开的；不再握紧的；松开的undomesticadj.非家庭的；非国内的undoubtingadj.信任的(不怀疑的)undo a tie解开领带undogmaticadj.非教条的非武断的.undo a knot解结