求救 英文翻譯的問題

Those who are in favor of bringing the wolves back to Yellowstone have their arguments.
Biologists say that wolves 41 play an important part in the ecosystem of this wilderness area.
Through their 42 hunting they remove the weak and diseased members of the elk and deer populations.
They keep the population 43.from growing too large.
Naturalists believe the wolves are an essential part of the wilderness.
And they are the only part of the ecosystem that is 44missing from the Yellowstone area.
Naturalists want to restore Yellowstone to the way it 45was before Columbus set foot in America in 1492.
They want visitors to the park to have the experience of hearing wolves howl at night—an experience many describe as the best the wilderness has to offer

那些傾向於把狼帶回黃石公園的人有他們的論點。
生物學家認為狼_扮演_著很重要的角色在野生地帶的生態系統中。
藉由他們的__狩獵___過程中，去淘汰弱小 及 生病的麋鹿成員
他們制止數量增長太大
自然學家相信狼是野生地帶中的必要成員
且他們是黃石公園的生態系統中唯一缺少的部分
自然學家想要回復黃石公園到1492哥倫布踏上美洲之前。
他們希望遊客到了公園能夠有聽到狼在夜間嚎叫的經驗，藍色的地方怎麼翻譯呢?

一個野生地帶所能提供的最好經驗?