1. To work a treadle. 
   踩踏板操作
2. She was working the treadle of her sewing - machine. 
   她正用脚踩动缝纫机的踏板。
3. In the early 1980s, thousands of farmers in Bangladesh began using treadle pumps to irrigate small plots of homestead gardens instead of lugging heavy buckets of water. 
   在1980年代初期，孟加拉国有几千农民开始用踩踏水泵灌溉自家菜园内的小块作物，而不用提一桶桶沉重的水。

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