伸手抓，抓到什麼算什麼
這一支就是核心畫面，以及從畫面裡拆出來的兩半：內容很雜的那一半，跟你沒得選的那一半。
noun · B2
A grab bag is a bag or box filled with small wrapped presents. You put your hand in and pull one out without looking, so you do not know what you have got until you open it.
摸彩袋／福袋
核心畫面
One way to hold this compound: a closed bag held out at a fair, and a hand going in. You cannot see what is in there, you do not get to pick, and whatever your fingers close around is yours. Two separate ideas sit inside that one movement — the bag is full of different things, and you had no say in which one you got. Almost everything the phrase does later comes from pulling those two ideas apart and using one of them at a time.
可以把這個複合詞想成園遊會上的畫面：一個封起來的袋子舉在面前，一隻手伸進去。你看不到裡面，也不能挑，手抓到什麼就是什…更多收起
可以把這個複合詞想成園遊會上的畫面：一個封起來的袋子舉在面前，一隻手伸進去。你看不到裡面，也不能挑，手抓到什麼就是什麼。這一個動作裡其實藏了兩件事。一是袋子裡東西很雜，二是你根本沒得選。這個詞後來的用法，多半就是把這兩件事拆開，一次只用其中一件。Two branches
抓了就走的袋子
這一支只留下核心畫面裡的 grab 這個動作，把「看不見」「沒得選」全都丟掉了。袋子的內容在這裡是清楚的，重要的只剩「順手一拿就能帶走」。
noun · B2
A grab bag is also a bag kept packed and ready with the things you would need in an emergency — papers, water, a torch — so that you can pick it up and leave a building quickly.
應急包／逃生包