An afterthought is something you add, say, or do later, because it was not in the plan from the start.

An afterthought afterthought is something you add, say, or do later是你後來才加上、才說、或才做的事, because因為 it was not in the plan from the start它一開始根本不在計畫裡。

You might finish a letter and then add one more line as an afterthought. A company might add a safety part as an afterthought — meaning they did not really design it in; they stuck it on later, and it often shows.

You你 might finish a letter and then add one more line as an afterthought可能寫完一封信，然後才想到多加一行，當作afterthought。A company一間公司 might add a safety part as an afterthought可能把安全部件當作afterthought加上去 — meaning they did not really design it in意思是他們一開始根本沒有真的設計進去; they他們 stuck it on later, and it often shows是後來才硬加上去的，而且常常看得出來。

The word can sound a bit unkind: if a person feels like an afterthought, they feel they were not important enough to be included at first. It can also be light: Oh — and bring the keys, as an afterthought.

The word這個字 can sound a bit unkind聽起來可能有點無情: if a person feels like an afterthought如果一個人覺得自己像個afterthought, they他們 feel they were not important enough to be included at first就表示覺得自己一開始沒有重要到會被納入考量。It它 can also be light也可以是輕鬆的: Oh — and bring the keys, as an afterthought「喔——對了，記得帶鑰匙」，就是一種afterthought。

Though actually, it sits opposite the idea of thinking ahead. The word is after- plus thought, and it was probably shaped to match forethought.

Though actually不過其實, it它 sits opposite the idea of thinking ahead跟「事先想到」這個概念是相反的。The word這個字 is after- plus thought是after-加上thought組成的, and而 it was probably shaped to match forethought很可能是為了對應forethought（先見之明）而造出來的。