| 单词 | flat-based |
| 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〔stirrup〕A flat-based loop or ring hung from either side of a horse's saddle to support the rider's foot in mounting and riding; a stirrup iron.马镫：从马鞍两边悬挂下来的供骑马人上下马时支撑脚用的平底套或环；马蹬美国传统 |
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