One way to picture one-to-one: two rows facing each other, with a single line drawn between each pair. One thing on the left, one thing on the right, nothing spare and nothing shared. Everything this word does comes from that picture. When the two rows are rows of people, there are exactly two people in the room. When they are rows of things, every item has its own partner.
one-to-one 可以想成兩排東西面對面站著，每一組之間畫一條線。左邊一個，右邊一個，沒有多的，也沒有共用的。它所有的意思都從這張圖長出來。當兩排是人，房間裡就剛好兩個人；當兩排是東西，每一個都有自己的搭檔。中間那個 to 是「朝向」，正好就是那條連線。
登入就可以看每一支怎麼連回核心畫面。