NPR News:黑人女性遭误杀案宣判后 美两名警察在抗议活动中遭枪击

重点讲解：
1. be charged with 指控；控告；
They are charged with bilking investors out of millions of dollars.
他们被控诈骗了投资者几百万美元。
2. commit to sth./doing sth. 承诺，保证(做)；忠于(某人)；
Russia and the other republics are committed to destroying most of their nuclear arsenals.
俄罗斯和其他加盟共和国承诺销毁他们储存的大部分核武器。
3. wait for 等；等待；等候；
They should be allowed to wait for cheaper technologies to be developed.
应该允许他们等到更廉价的技术被开发出来。
4. put in place （法律、政策、行政体系等）正在运作，就位；
They're offended by the elaborate security measures the police have put in place.
他们被警方部署的繁复安全措施惹怒了。