With his left hand he groped for the knob, turned it, and pulled the door open.(他用左手摸索到门把手，转动把手，把门拉开。)
He twiddled a knob on the dashboard.(他转动着这块仪表板上的一个旋钮。)
He says he put his hand through a hole in a bathroom door where the knob was missing.(他说，他把自己的手放进了一个不见了旋钮的卫生间的门洞。)
He turned on the radio and fiddled with the knob until he got a talk show.(他打开收音机，调动旋钮，直到他收到了一个谈话节目。)
A report of Brech describes a badly diseased heart, enlarged to the left with a protruding aortic knob.(布莱奇的一篇报道描述了一个病重的心脏，其左侧扩大，主动脉瘤突出。)
He twiddled with the radio knob until he found the right programme.(他转动了一会收音机旋钮才找到了合意的节目。)
Something I can measure and I can tabulate, and when I turn my dT knob, I know what's going to happen to the enthalpy.(我可以测量它并制成表格，当我转动dT旋钮，我就知道焓的变化了。)
She soliloquized, "Oh, if I only had a brass andiron-knob again!"(她自言自语地说：“啊，要是我能再得到一个柴架上的铜把手就好了！”)
She can feel the knob of his elbow, pressed against her teeth, and then he stops.(她可以感觉到他的肘关节压在她的牙齿上，过了一会儿，他的手停止不动了。)
He works in your industry and you'll have to hob knob, not just knob rub.(他在你的企业里工作，你准会平添麻烦，而不仅仅是伤人感情。)
