n.（美国西部的）野马，半驯化马
The bronco spilt his rider.
野马把它的骑手从背上摔了下来.
a bucking bronco in the rodeo
牛仔竞技表演中一匹弓背跳跃的野马
This bronco bucked its rider in just ten seconds.
这匹野马仅10秒钟就弓背跃起把骑者摔了下来.
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