News Plus慢速英语:3000尾中华鲟放归长江 无人机被频繁用于中国大气污染执法

重点讲解：
1. in an effort to do sth.
例句：In an effort to save money our company president aced the promotions budget.
为节省开支,我们公司的总裁大幅削减了推广活动的预算。
2. save sb. from sth./doing sth. 免去；省去；使免受；
例句：She was hoping that something might save her from having to make a decision.
她希望有什么能使自己不必作决定。
3. in a row 连续地；接连不断地；不间断地；
例句：Many e-trading websites prohibit buyers from placing two bids in a row.
很多拍卖网站都禁止买家连续两次下标。
4. due to 由于；因为；
例句：She was amerced due to overspeed driving.
她因超速开车而被罚款。
5. play a role in 在……中发挥作用；
例句：He played a leading role in solving the problem.
他在解决这个问题方面起了主要作用。
6. be responsible for 负有责任的；应承担责任的；
例句：I was responsible for the crushing defeat.
我对这次惨败负有责任。