自己騎、自己開的三輪車
同一個字，範圍大小由地區決定，車型由場景決定。
noun · B1
Any vehicle that has three wheels instead of four — for example a motorcycle built with three wheels, a child's tricycle, or a wheelchair with three wheels.
三輪車輛（泛指）
核心畫面
One way to hold this word: three and wheel and -er, put together to mean the thing that runs on three wheels. The word says nothing else — not who rides it, not where, not what it is for. That is why it lands on so many different machines, and why the country you are reading in decides which one you picture.
可以想成：three 加 wheel 加 -er，合起來就是「靠三個輪子跑的那個東西」。這個字只講這一件事。誰在騎、…更多收起
可以想成：three 加 wheel 加 -er，合起來就是「靠三個輪子跑的那個東西」。這個字只講這一件事。誰在騎、在哪裡騎、用來做什麼，它一個字都沒說。所以它才能套在那麼多不同的車上，而你腦中浮現哪一種，往往是看你讀的是哪裡的英文。Two branches
載客的三輪車
還是三個輪子的車，但這一種是別人開、你坐上去的。
noun · B2
A small three-wheeled taxi with an open or half-open side, also called an auto-rickshaw, a tuk-tuk, or a trishaw.
三輪計程車；嘟嘟車