Schools without a nurse on duty may be more likely to send an injured child to a hospital.

VOA: special.2009.08.06

There is one military aid on duty every second of every day including overnight.

所以每天每秒钟,包括整一个晚上,都有一个军事助理值班。

普林斯顿公开课 - 国际座谈会课程节选

It's always Milton's duty - this is the reason that he was put on this earth: to liberate a people from any such constraining customs.

弥尔顿的使命是,-他是为此才诞于世上：,将英格兰民族从所有抑制人的传统中解放出来。

耶鲁公开课 - 弥尔顿课程节选

So the Institute of Medicine proposed that residents be required to get five continuous hours of rest for every sixteen hours on duty.

VOA: special.2010.07.13

they can be found to have breached their fiduciary duty, I'm on the hedge fund side and against the sort of company management side.

他们可以被发现存在渎职行为，我站在对冲基金的阵营上并且反对,公司管理的主张。

耶鲁公开课 - 金融市场课程节选

He was on duty when the passenger ship Titanic sank in the Atlantic Ocean in nineteen twelve.

VOA: special.2010.01.31

But many cultures focus on an ethics of community, bringing together duty, status, hierarchy, and interdependence.

但很多文化则重于集体道德，强调义务，地位，等级制度，互相依赖。

耶鲁公开课 - 心理学导论课程节选

It will house 8,000 people in tents. Fifty security guards will be on duty around the clock.

VOA: standard.2010.03.29

s our duty as Americans to put you on the right track."

作为美国人我们有义务，And，it’,让你回归正道“

普林斯顿公开课 - 国际座谈会课程节选

According to the U.S.-based Committee to Project Journalists, at least 17 foreign and Afghan journalists on duty in Afghanistan have been killed since the 2001 invasion to oust the Taliban from power.

VOA: standard.2009.09.10

In another famous illustration, "The Army of the Potomac - A Sharp-Shooter on Picket Duty."

VOA: special.2010.07.25

Each day,thousands of Americans are called to serve on jury duty.

VOA: special.2009.08.31

The U.S.military uses dogs to help troops on sentry duty and bomb-sniffing patrols.

VOA: standard.2010.05.18

Speaking at the vigil, New York City Mayor Michael Bloomberg said it is the "sacred duty" of New Yorkers to carry on the memories of those lost.

VOA: standard.2009.09.11

U.S.Army Sergeant Jeremy Tormala, on his second tour of duty in Iraq, thought the elections gave a good indication that Iraqi forces will be up to the task.

VOA: standard.2010.03.08