东汉末庐江（今安徽庐江西南）人。与陈兰以氐六县反抗曹操。梅成以伪降之计，成功欺骗了于禁。于禁回军后，梅成与陈兰转入灊山。曹操麾下大将张辽督领张郃、牛盖等人，强攻天柱山，斩杀陈兰、梅成。
因为胰脏肿大，十岁的越南男孩梅成东每个月都需要输血来延缓病情，一个胰脏切除手术可以让他重获新生；
Suffering from a swollen pancreas, ten-year-old Vietnamese boy Mai Thanh Dong needs blood transfusions every month to keep him alive.
哈梅内伊和内贾德竭力将西方国家说成是为了他们自身和以色列客户的利益，报复性地向伊朗保密核技术，引起众人赞同。
The efforts of Messrs Khamenei and Ahmadinejad to portray Western countries as vindictively hoarding technology for themselves and their Israeli clients found an appreciative audience.
在1848年田纳西在此地建一个墓地纪念碑，并在1925年成为梅里韦瑟刘易斯国家纪念碑。
In 1848 Tennessee erected a grave-site marker that in 1925 became the Meriwether Lewis National Monument.
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