替別人找出來
最接近核心畫面的一支：把那雙眼睛派出去，找某一類東西。
noun · B2
Someone whose job is to look for or notice one particular kind of thing and tell the people they work for about it. Most often it is a person sent to games or shows to find people with talent.
球探；發掘者
核心畫面
You can think of a spotter as a borrowed pair of eyes. Someone is put where they can see what the people in the middle of the action cannot — the whole field, the blind side of a truck, the bar above a lifter's face, the one bird in the tree. Whatever happens next, their part is to see it first and say so.
spotter 可以想成「借給別人的一雙眼睛」。有人被放在一個看得到全場的位置。場上的人、開車的人、正在舉重的人，都…更多收起
spotter 可以想成「借給別人的一雙眼睛」。有人被放在一個看得到全場的位置。場上的人、開車的人、正在舉重的人，都有自己看不到的地方。這個人就負責幫他們看。看到了，就講出來、記下來，或者伸手接住。不管接下來要做什麼，他的價值都在「先看見」這一步。From the word’s history
From spot + -er. As a verb, spot means to see and recognise something, so a spotter is simply the one who does the seeing.
這個字來自 spot 加上 -er。spot 當動詞是「看見並認出來」，-er 是「做這件事的人」。所以 spotter 字面上就是「負責看出來的那個人」，而它每一個用法都還守著這件事。
Wiktionary etymology supplied in this packet (source_ref kaikki:3f6f69a190036ae4:1075221392:32866): from spot + -er.
Three branches
替別人看著，隨時接手
同樣是借眼睛，但這一支的重點從「找到」換成「守著」：看到不對就要馬上動作。
noun · B2
Someone who stands next to a person lifting a heavy weight or trying a hard move, watching closely and ready to take the weight or catch them if it goes wrong.
保護者；幫看槓的人
為了興趣而看、而記
一樣是專注地看，只是沒有人委託他。他是為了自己在看，看完寫進本子裡。
noun · B2
Someone who spends time watching one particular kind of thing — birds, trains, planes — because they enjoy it, and who writes down each one they see.
（賞鳥、鐵道等）愛好者