natural calamity的用法和樣例：
例句
- The earthquake was a terrible natural disaster.
那次地震真是一場可怕的天災。 - Natural disasters, man-made disasters, disease, had wantonly killed a number of lovely life?
天災，人禍，疾病，曾肆意奪走了多少可愛的生命？ - The natural calamity was quite serious.
這場自然災害很嚴重。 - These difficulties are caused by natural disasters.
這些困難都是由自然災害造成的。
