I'd agree but then checked. The Web said one gen. is 20-30yr

來源: 7grizzly 於 2025-09-11 13:42:27 [檔案] [博客] [舊帖] [給我悄悄話] 閱讀數 : (0 bytes)

回答: 20 years' span almost cover 2 generations, X, X+1 由移花接木於 2025-09-11 10:23:08

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• X could be more than 1, 1 1/2, 2 & so on -移花接木- ♂ (0 bytes) () 09/11/2025 postreply 14:53:16