| 单词 | udf |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔shout down〕There were scuffles when UDF hecklers began to shout down the speakers.来自联合民主阵线的诘问者开始对演讲者大声起哄时，引发了多次冲突。柯林斯高阶〔umbrella〕The UDF was an umbrella body comprising 600 anti-apartheid groups.联邦国防军是由600个反种族隔离团体组成的机构。麦克米伦高阶 |
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