hay retainer

例句：

1. 1. The farmer used a hay mower to cut the hay for the animals.
   农民使用一台割草机来为动物割草。
2. 2.The hay baler was designed to compact the hay into a more manageable form.
   干草打包机被设计成将干草压缩成更易于管理的形式。
3. 3.The hay press is essential for storing large amounts of hay for winter use.
   干草压扁机对于储存大量干草以备冬季使用至关重要。