variety degeneration

• 品种退化

variety degeneration的用法和样例：

例句

1. In fact, he told us that the production of weak nerved dogs would be nothing less than the degeneration or destruction of the breed.
   事实上，他告诉我们说，繁育弱神经型的犬只，恰恰意味着让这一品种退化或最终毁了它。