| 单词 | movable control |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔dial〕A movable control knob or other device on a radio or television receiver used to change the frequency.调谐钮：收音机或电视机用来转换频率的转动控制钮或其它装置美国传统〔elevator〕A movable control surface, usually attached to the horizontal stabilizer of an aircraft, that is used to produce motion up or down.升降舵：一个可动控制台，通常安装在飞机的尾翼上，用来操纵飞机升降美国传统〔valve〕The movable control element of such a device.栓塞：这种装置的可移动的控制部分美国传统 |
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