听力原文

Job done, the villagers can relax, at least until tomorrow.
当工作完成，至少在明天来临之前，农户们得以休息。
But for the nesting swallows, the work of raising a family has only just begun.
然而对这些筑巢的飞鸟而言修筑家园的宏大工程才刚刚开始。
In the newly planted fields, little egrets hunt for food. The rice paddies harbour tadpoles, fish and insects and the egrets have chicks to feed.
在新耕种的田地里，白鹭在寻找食物。稻田成了虫、鱼、蝌蚪的乐园。而白鹭正好以此哺育幼鸟。
This colony in Chongqing Province was established in 1996, when a few dozen birds built nests in the bamboo grove behind Yang Guang village.
重庆自然保护区建立于1996年，当成群的鸟儿安家在阳光村后方的小竹林。
Believing they were a sign of luck, local people initially protected the egrets and the colony grew.
当地人将其视为幸运的使者，他们最初小心保护这些白鹭，白鹭数量逐渐增多。
But their attitude changed when the head of the village fell ill. They blamed the birds and were all set to destroy their nests, when the local government stepped in to protect them.
但当村长病重后他们的态度发生了转变。当政府开始介入保护鸟群时，他们开始敌视鸟群并着手摧毁巢穴。

重点讲解

重点讲解：
1. hunt for
搜寻；寻找；
eg. Bats sleep in the daytime and come out to hunt for food at night.
蝙蝠白天睡觉，而夜间出来觅食。
eg. He turned the room upside-down to hunt for the lost key.
他把屋子翻得乱七八糟，寻找遗失的钥匙。
2. be set to do sth.
做好准备的；可能做某事；
eg. He is set to pulverise his two opponents in the race for the presidency.
他决心在总统竞选中彻底击垮他的两个对手。
eg. All my bags are checked in. I guess I'm all set to go.
我的行李都检查完了，看来我可以走了。
3. step in
介入，干预，插手（棘手问题）；
eg. There are circumstances in which the State must step in to protect children.
有些情况下，国家必须出面保护儿童。
eg. If they step in where they're not wanted, they'll get their noses put out of joint.
如果他们介入与他们无关的事，会有人阻止他们的。