短语讲解：
1. Screaming police sirens have been roaring across London over the past few nights, after a demonstration in connection with the police shooting of a 29-year old man degenerated into rioting in the low-income Tottenham area of northern London over the weekend.
in connection with与…有关,连同
例句：He was in detention in connection with the bribery affair.
他因与贿赂事件有牵连而被拘留了。
2. The situation has prompted British Prime Minister David Cameron to break off his overseas holiday to come back and chair an emergency cabinet meeting.
break off停止; 断交
例句：When she came in, Bob broke off his talk with Jane.
当她进来�
