Thousands of aftershocks have set back efforts to clear roads to quake-hit areas.
清理通往灾区道路的工作也因为数千次余震而受到影响。
It is important for the us to negotiate an agreement it can join, because another agreement that did not involve the United States would set back efforts to protect the climate.
重要的是美国通过谈判达成一个它能加入的协议，因为再来一个与美国无关的协议将会挫败保护气候的努力。
They encouraged secret efforts to set back Iran’s research and production schedules.
他们鼓励暗中努力阻碍伊朗的研究和生产日程。
They encouraged secret efforts to set back Iran's research and production schedules.
他们鼓励暗中努力阻碍伊朗的研究和生产日程。
In 1999, I set out to study the effects of efforts to bring the suburban middle class back to New York City.
我于1991年开始研究努力成就对纽约市城郊中产阶级的影响。
In 1999, I set out to study the effects of efforts to bring the suburban middle class back to New York City.
我于1991年开始研究努力成就对纽约市城郊中产阶级的影响。
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