一長條在空中拉開的東西
這一支是「往外流」的實體版：東西真的長長地拉開在空氣裡，看得到、摸得到。
noun · B1
A long, narrow strip of coloured paper that people hang up or throw as a decoration at parties and other special days.
彩帶、紙條
核心畫面
One way to hold this word: stream plus -er, the thing that keeps pouring out. Fix one end of something and let the rest run on — a strip of paper taped to a wall with its tail pulled straight by the wind, or a picture taped to nothing at all, running out of a camera minute after minute to whoever is watching. Both pictures are the same shape: one end anchored, the rest flowing away from it. That is why one plain word covers a paper ribbon at a birthday party and a person talking to a webcam.
可以這樣抓這個字：stream（流）加上 -er（做這件事的那一個），就是「一直往外流出去的東西」。想像一端被固定住…更多收起
可以這樣抓這個字：stream（流）加上 -er（做這件事的那一個），就是「一直往外流出去的東西」。想像一端被固定住，剩下的一路往外延伸。一條紙貼在牆上，尾巴被風拉成一條線。或者根本沒有紙，是一段畫面從鏡頭裡一分鐘一分鐘地流出去，流到正在看的人那邊。兩個畫面的形狀其實一樣：一頭釘住，其餘的往外流。所以同一個字，可以是生日派對上的紙彩帶，也可以是對著鏡頭講話的人。From the word’s history
From Middle English stremer, formed from stream plus the ending -er — literally the thing that streams.
來自中古英文的 stremer，由 stream（流）加上字尾 -er 組成，字面上就是「會流出去的那一個」。這個組合在今天的兩支用法裡都還看得出來。
Wiktionary entry for streamer (kaikki:3f6f69a190036ae4:1029225569): "From Middle English stremer, stremere, equivalent to stream + -er."
Two branches
把內容一路送出去的人和服務
這一支把「往外流」的東西從紙布換成資料：流出去的不是布條，是聲音和畫面。
noun · B1
Someone who sends live video of what they are doing over the internet, most often playing a video game, so that people can watch and send messages while it is happening.
實況主、直播主