rising temperatures and overfishing in the pristine waters around the Antarctic could see king penguin populations pushed to the brink of extinction by the end of the century, according to a new study.
2019年12月六级真题（第三套）阅读 Section C
柯林斯高阶英汉双解学习词典释义
N-SING
边缘
If you are on the brink of something, usually something important, terrible, or exciting, you are just about to do it or experience it.