听力原文

As dawn arrives, forest birds claim their territories in the canopy.
晨曦乍现，森林之鸟在树荫地下宣告它们的领地。
But there's one call which stands out among the rest, virtuoso of the forest symphony.
这儿有一种声音在其中显得格外突兀--森林交响乐的艺术大师。
It's a gibbon. Living on a remote mountain range in south central Yunnan is one of the few remaining wild gibbon populations in China.
那是一只长臂猿。在云南中南部偏远的山脉之中居住着中国的珍稀动物野生长臂猿群。
The black-crested gibbons of Wuliangshan. They are confined to these forest mountains, so remote and steep that few hunters ever come here.
他们是无量山里的黑冠长臂猿。他们活动范围局限在这些山林之中，如此偏远而又陡峭的环境以至于少有猎人光顾。

重点讲解

重点讲解：
1. stand out
引人注目；显眼；突出；
eg. Every tree, wall and fence stood out against dazzling white fields.
每棵树、每堵墙和每道栅栏都在白得耀眼的田野映衬下十分夺目。
eg. His height makes him stand out in the crowd.
他身材高大，因此在人群中很突出。
eg. I stand out in a group interview.
在集体面试中脱颖而出。
2. be confined to
受限制的；被限定的；
eg. These dangers are not confined to smokers.
这些危险不只是困扰吸烟者。
eg. Our knowledge about agriculture has so far been exclusively confined to books.
我们对农业学的知识至今只限于书本上所说的。
eg. The previously free distribution of text books will now be confined to students who are needy.
以前免费发放课本，现在只给贫困学生。