double seedlings

例句：

1. 1.The double seedlings are growing well in the greenhouse.
   温室里，这些双株苗生长得很好。
2. 2.These double seedlings are resistant to pests and disease.
   这些双株苗对病虫害具有抗性。
3. 3.The nursery is selling double seedlings for sale.
   苗圃正在出售双株苗。