unstable ion不稳定离子unstableadj.不稳定的；易变的unstable subsidence未稳沉采煤沉陷地unstable hemogiobin不稳定血红蛋白unstable hemoglobin不稳定血红蛋白unstable association不稳定组合unstable FOPDT plant一阶时滞不稳定对象unstable counterplea不安抗辩权unstable equilibrium不稳定平衡unstable lubrication非永久润滑unstable premutation不稳定性前突变unstable constituent不稳定成分