"Our philosophy with the island has always been, ‘OK, remove the threats and let the island go back to what it was, '" says ecologist Christina Boser.

2018年12月六级真题（第三套）阅读 Section A

"We're obligated to keep a pulse on the population for at least five years after the foxes are delisted," says Boser.

2018年12月六级真题（第三套）阅读 Section A

But keeping those foxes from harm will occupy Boser and her colleagues for years to come.

2018年12月六级真题（第三套）阅读 Section A

So Boser has to vaccinate her foxes against various diseases.

2018年12月六级真题（第三套）阅读 Section A