Cambowl
凸輪滾子, 踏盤轉子
??? 情景例句
Is he a client?
他是顧客嗎？
You can receive our program at short wave 37.5 MH.
你可在短波37.5赫茲上收到我們的節目。
In the evenings he studied hard for his exams, and most mornings he took tourists around Oxford.
他晚間努力學習，以應付考試，而大多數早上，他則帶領游客在牛津大學參觀。