sterile tree

例句：

1. 1. The farmer'swife was sterile, so she couldn't have children.
   这位农民的妻子是无生殖能力的，所以她不能生孩子。
2. 2. Thesoil is barren, making it difficultfor plants to grow.
   土壤贫瘠，使得植物难以生长。
3. 3. Infertile eggs arerare, and only a few couples canconceive naturally.
   不育的卵子很少见，只有少数夫妇能自然受孕。