名词
中文翻译：联合收割机
同义词：
['combined harvesters', 'combined threshing machines']
例句：
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1. The farmers use these machines to combine their crops for easier harvesting.
农民使用这些机器来将作物合并，以便更容易地收获。
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2. The combined harvester-threshers are essential tools in the agricultural industry.
联合收割机和打谷机是农业行业必不可少的工具。
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3.The farmers need to combine different types of crops to get the best results from their harvesting efforts.
农民需要将不同类型的作物结合起来，以获得他们的收割工作的最佳结果。