sterile basidium

例句：

1. 1. The sterile soil prevents the growth of many plants.
   贫瘠的土地阻止了许多植物的生长。
2. 2. The farmer was surprised to find that his cows were sterile.
   农民惊讶地发现他的奶牛是无性的。
3. 3. The scientists discovered a way to make bacteria more sterile.
   科学家们发现了一种使细菌更无性的的方法。