使不稳定 meaning in Chinese

labilization
unsettle

The action that weak cold air penetrated into the tropical cyclone made the low pressure become vortex potential instability , and finally turned into kinetic energy . the results were that the center pressure of low became lower , the wind velocity around the cyclone was stronger and the precipitation became more
冷空气在中低层的渗透主要使大气斜压作用加强，使不稳定能量的积聚并最终释放；还造成台风涡旋位势不稳定，使热带气旋中心气压降低，周围风力加大，因而产生更大的降水。