不均衡

例句：

1. 1.The two sides of the coin are not equal in size.
   硬币的两面大小不一。
2. 2.The distribution of resources is often unbalanced.
   资源的分配往往不平衡。
3. 3. The growth rate of the population is not symmetrical.
   人口增长率不是对称的。