夏说英语新闻晨读 第228期:世界最大规模网络袭击（在线收听）

 本期内容：

International investigators are hunting for those behind an unprecedented cyber-attack that affected systems in dozens of countries, as security experts sought to contain the fallout. The assault, which began Friday and was being described as the biggest-ever cyber ransom attack, struck state agencies and major companies around the world--from Russian banks and British hospitals to FedEx and European car factories.

Unprecedented：史无前例的
Cyber-attack：网络攻击
Contain：控制
Fallout：后果
Assault：攻击
Ransom：赎金