BBC在线收听下载:美国宣布2025年前自愿减排温室气体28%

短语讲解：

1. The prosecutor was in charge of the inquiry into the death last year of a teenager, Berkin Elvan, who was hit by a teargas cannister during anti-government protests.

in charge of 主管，负责; 照料
例句：Comrade Yang will be in charge of that work for the time being. 
杨同志将暂时负责那项工作。 

2. They are trying to reach a framework agreement setting out the political parameters of a deal, which would be used as a guideline for technical experts to work out the practical details.

work out 解决; 作出
例句：He hopes this plan will work out. 
他希望这项计划将是切实可行的。 

3. The Vatican has defended the appointment this month of a bishop in Chile, who's been accused of covering up sex abuse by a priest.

cover up 盖起来;  裹住; 掩盖;  掩饰
例句：He tried to cover up his guilt by lying. 
他企图用说谎来掩盖罪行. 

4. Mike Wooldridge looks at the Iraqi bid to recapture the city.

look at 看
例句：They would look at paintings together. 
他们将一起观赏油画。