1. Prosecutors and the public have zeroed in on Purdue Pharma, which introduced the blockbuster drug OxyContin in 1996.

zero in on 瞄准（目标）;向…移动;全神贯注于（问题或主题）

He raised the binoculars again and zeroed in on an eleventh-floor room.

他再一次举起双筒望远镜，瞄准了11层的一个房间(K9l,d0c4r。

2. He in effect invented the field of medical advertising, creating the first family fortune after aggressively marketing the sedatives Librium and Valium to doctors, without a serious study of the addiction risks.

in effect 其实;实际上

That deal would create, in effect, the world's biggest airline.

事实上，这一协议将促成世界最大航空公司的成立Qeh^%cwin;%1k_BJ。

3. By the time that happened, his branch of the family no longer held a stake

by the time 到…的时候

By the time you get there the meeting will be over.

等你到了那里的时候，会议就该结束了k8z0SHuQVD@Y^u。