厄尔尼诺效应是指发生在赤道太平洋东部和中部的海水大范围持续变暖现象，与拉尼娜现象相反，厄尔尼诺现象出现时，局部地区会出现水温升高的情况。国家气候中心对此做了特别报道，称自2020年左右，拉尼娜现象便已经结
I have a sample program, which needs to execute 3 methods in a particular order. And after executing each method, should do error handling. Now i did this in a normal fashion, w/o using delegates like
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