| 单词 | threaded hole |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔nut〕A small block of metal or wood with a central, threaded hole that is designed to fit around and secure a bolt or screw.螺母，螺帽：中部有螺纹用于与螺栓或螺钉相配合的小块金属或木头美国传统 |
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