Think of an outline with three points sticking out: a folded scarf, an old sailor's hat, a slice of sandwich. Wherever you look at it from, there are three corners and no more. Once that outline is in your head, the word can also be laid over a situation — three sides pulling at the same thing, each one a corner.
可以想成一個有三個尖角的輪廓。折好的圍巾、水手的舊帽子、切開的三明治，都是這個形狀。不管從哪邊看，角就是三個，不多也不少。這個輪廓記住以後，還可以蓋到情況上面：三方在搶同一樣東西，每一方就是一個角。
登入就可以看每一支怎麼連回核心畫面。