Life is a test and this world a place of trial. Always the problems- or it may be the same problem will be presented to every generation in different forms. 人生是一种考验，而这个世界就是考场。每一代都要面对一些问题－－可能是相同的问题－－只不过问题的形式不同。
A specific crystalline form of a compound that can crystallize in different forms. 多晶形(物)一种能以不同形式结晶的化合物的特殊晶形
The occurrence of different forms, stages, or types in individual organisms or in organisms of the same species, independent of sexual variations. 多态性; 多型现象不受性别差异影响，在有机个体或同种物种的有机体中出现不同形态、阶段或类型
Ice, snow and steam are different forms of water. 冰、雪和蒸汽是水的不同形态。
