common sweet clover

例句：

1. 1. Common sweet clover is an important source of nitrogen forfarmers.
   普通甜三叶草是农民重要的氮源。
2. 2. The common sweet clover growswell in the meadows.
   普通甜三叶草在草地生长得很好。
3. 3. The sweetclover has been used as a naturalremedy for digestive problems.
   甜三叶草被用作天然的消化问题治疗剂。