sterile male technique

例句：

1. 1.The farmer's wife is barren and has never given birth.
   这位农民的妻子是无子嗣的，从未生育过。
2. 2.The soil was so barren that it couldn't support any plants.
   土壤如此贫瘠，以至于无法支撑任何植物生长。
3. 3. The couple decided to adopt a child from China because they were sterile.
   这对夫妇决定从中国领养一个孩子，因为他们自己不育。