If a report, a plan, or a story is sketchy, it is only a rough outline. Too few details sit there for the thing to be useful yet.

If a report, a plan, or a story如果一份報告、一個計畫，或一個故事 is sketchy是 sketchy 的 it is only就表示它只是 a rough outline個粗略的輪廓 Too few details太少的細節 sit there坐落其中 for the thing to be useful yet還不足以讓這個東西派上用場

Sketchy notes from class; a sketchy map with three roads and no names; a sketchy account of what happened. The picture behind the word is a sketch: a drawing that is not finished.

Sketchy notes from classsketchy 筆記 a sketchy map一張 sketchy 地圖 with three roads and no names只有三條路又沒標名字 a sketchy account of what happened對發生的事只有 sketchy 描述 The picture behind the word這個字背後的畫面 is是 a sketch一幅 sketch（素描） a drawing that is not finished一幅還沒完成的畫

This sense is ordinary and a little informal, fine in school and in the news, and it is not rude.

This sense這個意思 is ordinary and a little informal很普通，帶點口語 fine in school and in the news用在學校和新聞裡都沒問題 and it is not rude也不失禮

Though actually, younger speakers, especially in American English, have stretched it a long way. “That place is sketchy” or “he seems sketchy” means the person or place does not feel safe or honest — as if you cannot see enough to trust it. Some older speakers still hear only “unfinished.” If you are writing a careful essay, keep to the “not enough detail” sense unless you mean the slang on purpose.

Though actually不過實際上 younger speakers年輕人 especially in American English尤其是美式英語裡 have stretched it a long way把這個字延伸得更遠了 'That place is sketchy'「That place is sketchy」 or 'he seems sketchy'或「he seems sketchy」 means意思是 the person or place這個人或地方 does not feel safe or honest讓人覺得不安全、不可靠 as if you cannot see enough好像你看不清楚 to trust it沒辦法信任它 Some older speakers有些年長的人 still hear only 'unfinished.'聽到還是只會想到「沒完成」的意思 If you are writing a careful essay如果你在寫一篇嚴謹的文章 keep to the 'not enough detail' sense就保留「細節不夠」這個意思 unless you mean the slang on purpose除非你是故意要用這個俚語意思