However,like millions of others, Hooks left his studies to serve in the armed forces during World War II.

VOA: standard.2010.04.16

A thousand times in a thousand ways anybody who studies the American Civil War period is inevitably asked, "So what caused this war?"

每个研究美国内战史的人,总会不可避免地被人们反复问道,"究竟是什么导致了这场战争"

耶鲁公开课 - 美国内战与重建课程节选

Studies suggest nearly a third of war correspondents suffer from Post Traumatic Stress Disorder (PTSD).

VOA: standard.2010.07.01

Army War College National Security Studies professor Larry Goodson says the U.S.-Karzai relationship has been souring for some time, but that,in his opinion, the Obama team has not been able to formulate any alternative to Hamid Karzai.

VOA: standard.2009.08.03