夏说英语新闻晨读 第118期:大堡礁正在消亡（在线收听）

 本期内容：

More than one-third of the coral in the northern and central parts of the Great Barrier Reef is dead or dying, scientists said. The chief culprit for the mass bleaching of the past two months is high water temperatures—partly from the El Ni?o weather phenomenon, but aggravated by global warming. A cyclone lowered temperatures in the reef’s southern part.

词汇讲解：
Coral: 珊瑚
Great Barrier Reef: 大堡礁
Culprit：问题根源
Bleaching：大清洗
Aggravate：恶化
Cyclone：气旋