混合物本身：被打散、勻勻懸著
這一支就是核心畫面本身：搖過以後那罐混濁的液體。
noun · B2
A mixture in which tiny drops of one liquid are spread all through another liquid that it does not truly mix with, such as oil in water, so the two stay together instead of settling into layers.
乳化液
核心畫面
Think of a jar of oil and vinegar standing in two clean layers, and then someone shaking it hard. The oil does not vanish. It is cut into drops too small to see, and those drops hang all through the vinegar, which is why the liquid turns cloudy and thick instead of clear. That is the picture the whole word is built on: fine particles of one thing spread evenly through another and held there. Milk is that. is that. So is the pale, creamy paint in a tin, and so is the thin layer on a strip of photographic film — in every case, something has been broken up small and spread out, and the mixture stays as one until something makes it separate again.
可以想成一個罐子裡的油和醋，本來分成乾淨的兩層，然後有人用力搖它。油沒有消失。它被打成小到看不見的油滴，這些油滴懸在…更多收起
可以想成一個罐子裡的油和醋，本來分成乾淨的兩層，然後有人用力搖它。油沒有消失。它被打成小到看不見的油滴，這些油滴懸在醋裡到處都是。所以液體從清澈變得混濁、變得稠。這就是整個字的畫面：一種東西被打成細小的顆粒，勻勻地散在另一種東西裡，而且被撐住不沉下去。牛奶是這樣。美乃滋是這樣。罐子裡那種白白稠稠的漆也是這樣，底片上那層薄薄的藥膜同樣是這樣。每一個用法都在講同一件事：有東西被打散、被鋪開，而且暫時合成一體，直到有什麼讓它再分開。From the word’s history
The supplied source says emulsion was borrowed from French émulsion, from New Latin ēmulsiō, based on Latin ēmulgeō, to milk out or extract. Milk is the oldest example of the thing itself: fat squeezed out into tiny drops and spread through water, which is why it looks white rather than clear.
本次證據裡的 Wiktionary 記載：emulsion 借自法文 émulsion，源頭是新拉丁文 ēmulsiō，而它建立在拉丁文 ēmulgeō（擠出、擠奶）之上。可以想成最原始的例子就是牛奶本身：脂肪被擠成極小的油滴，散在水裡，所以看起來是白的而不是透明的。今天的每個用法，都還帶著那杯牛奶的樣子。
Wiktionary entries supplied in this packet (source_refs kaikki:3f6f69a190036ae4:1002231712:10345 and :1002242057:6303)
Three branches
鋪成薄薄一層：牆上的漆、刷漆這件事（英式）
把那罐混濁的液體倒出來、刷開，核心畫面就從罐子裡搬到了牆上。
noun · B2
In British English, a water-based paint used on the walls and ceilings inside a house, which dries with a flat surface that is not shiny.
乳膠漆
鋪在底片上的那層薄膜（專業）
同樣是「小顆粒勻勻散開再鋪成一層」，只是這一次散在膠質裡，而且薄到幾乎看不見。
noun · C1
The thin coating on the surface of photographic film or paper that reacts to light, so that a picture can form on it. A technical word.
感光乳劑