| 单词 | 铺沙 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔ballast〕To fill (a railroad bed) with or as if with ballast.铺沙石：用或似用沙石铺（铁路路基）美国传统〔sand〕The streets are slippery because they haven't been sanded yet.因为没有铺沙子，街道很滑。韦氏高阶 |
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