| 单词 | 界线分明 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔cumulus〕A dense, white, fluffy, flat-based cloud with a multiple rounded top and a well-defined outline, usually formed by the ascent of thermally unstable air masses.积云：一种浓密、平底状的白色云块，有一个多重圆形的顶部和界线分明的轮廓，通常是由不稳定的热气团上升形成的美国传统〔sharp〕There is a sharp distinction between crimes which involve injury to people and those that don't.造成人身伤害的犯罪和未造成人身伤害的犯罪之间界线分明。剑桥高阶 |
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