名词
中文翻译：打谷机
同义词：
['combine', 'threshingmachine']
例句：
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1. The farmerused a sheave wheel to harvest thewheat.
农民使用脱粒机收割小麦。
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2.The sheave wheel is essential for breakingdown large grains into smaller pieces.
脱粒机对于将大颗粒谷物分解成小颗粒至关重要。
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3. The sheave wheelhas been a staple in rural farming forcenturies.
脱粒机在农村农业中已经存在了几个世纪。