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