1. Insemination is often used as a method of assisted reproduction for couples struggling to conceive naturally.

人工受孕经常被用作对于自然受孕困难的夫妇的辅助生殖方法。

2. The veterinarian performed artificial insemination on the cow to increase its chances of pregnancy.

兽医对这头母牛进行了人工授精，以增加其怀孕的机会。