BBC在线收听下载:中国自主研发“猪角膜”让患者重见光明

短语讲解：

1. In a conversation with a fellow politician, Romero Juca implied he would act to deter the massive corruption investigations, known as the Carwash scandal, a billion-dollar bribery scheme which allegedly involves dozens of politicians, including himself and other members of the PMDB, the now governing party in Brazil.

dozens of 很多
例句：The executive branch also includes dozens of government agencies.
行政机构还包括许多政府机构。

2. The self-styled Islamic State has said it carried out the bombings, which killed dozens of people in President Assad's coastal heartland.

carry out 进行; 执行; 完成
例句：No matter what we do, we must carry out our duties.
无论干什么工作,我们都应履行自己的职责。

3. Up to five million people in China are estimated to have damaged corneas.

up to 多达; 直到; 在于…; 能胜任
例句：His total debts tot up to RMB 500.
他的债务共计为人民币五百元。