田裡的拾穗
這一族就是核心畫面本身，也是這個字最早的樣子。
verb · C1
To go over a field or an orchard after the harvest and pick up the grain, fruit or vegetables that the pickers left behind.
拾穗、撿拾（收割後留下的作物）
核心畫面
You can think of glean as a field after the harvest. The crop has been cut and carried off, the cart is gone, and what is left is scattered flat on the ground: a grain here, a potato there, one missed fruit under a leaf. Anyone who wants those has to walk the ground and pick them up one at a time, bending for each one. Nothing is handed over in a sack. Wherever this word goes, those three things go with it — the pieces are small, they are taken off a surface, and the work is slow.
glean 的核心畫面可以想成收割後的田。作物已經割走了，車也開走了，剩下的東西散落在地上：這裡一粒穀子，那裡一顆馬…更多收起
glean 的核心畫面可以想成收割後的田。作物已經割走了，車也開走了，剩下的東西散落在地上：這裡一粒穀子，那裡一顆馬鈴薯，葉子底下一顆漏掉的果子。想要這些的人，只能走進田裡，一個一個彎腰撿起來。沒有人整袋交給你。這個字走到哪裡，都帶著這三件事：東西很小、要一個一個從表面上撿、而且慢。From the word’s history
The packet's Wiktionary etymology takes the verb from Late Middle English glenen, from Old French glener, from Late Latin glen(n)ō 'to make a collection', with the earliest recorded use being the harvest one. So the field is not a metaphor added later — it is where the word starts.
依照本次提供的維基詞典字源，這個動詞來自晚期中古英文 glenen，再往前是古法文 glener，更早是晚期拉丁文 glen(n)ō（把東西收集起來），而最早記錄下來的用法就是田裡的拾穗。所以那片田不是後人加上去的比喻，它就是這個字出發的地方。
Wiktionary etymology supplied in this packet (source_ref kaikki:3f6f69a190036ae4:402256369)
Three branches
撿的是看不見的東西
把田換成一堆散落的來源，把穀粒換成零碎的消息，動作完全不用改：還是一點一點撿，還是慢，還是沒人整包給你。
verb · C1
To collect small pieces of information slowly and with some difficulty, a bit at a time and from several different places, because nobody hands the whole thing to you.
（一點一點地）蒐集、探得（資訊）
動物一隻一隻撿著吃
生物學把同一個動作借去描述覓食方式：不在空中追，而是從葉面、樹皮、地面上一隻一隻撿。跟核心畫面對得很準——小、單個、從表面撿。
verb · C2
Of a bird or a bat: to feed by picking insects and other small creatures off leaves, bark or the ground one at a time, instead of catching them in the air.
（鳥、蝙蝠）逐一啄食、撿食（獵物）