| 单词 | diametrical |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔butterfly valve〕A disk turning on a diametrical axis inside a pipe, used as a throttle valve or damper.节流阀，减压阀：管道内沿直径中心轴线上的圆片状旋钮，用作节流阀门或阀门美国传统〔diametrical〕He's the diametrical opposite of his brother.他和他的弟弟截然不同。牛津高阶 |
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