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The exchange of prisoners of war was one of the key elements of the UN's peace plan.

交换战俘是联合国和平计划的主要内容之一。

《柯林斯英汉双解大词典》

As the first rebel victory of the Revolutionary war, the Battle of Fort Ticonderoga served as a morale booster and provided key artillery for the Continental Army in that first year of war.

作为独立战争的第一次反抗的胜利，提康德·罗加堡战役极大地鼓舞了士气，并为大陆军的第一年战争提供了关键的火炮。

youdao

Iran is played host to a high-profile summit of two key war-torn neighbors, Pakistan and Afghanistan, in a bid to put an end to conflicts that rage along its borders.

VOA: standard.2009.05.24

Again, each of them seems to represent, in a superior way, the key components of the human soul, the appetitive, the war-like or spirited, and the rational.

每一位角色，似乎都代表着，较优秀的人类灵魂的关键构成要素，欲望，战士精神，以及理性。

耶鲁公开课 - 政治哲学导论课程节选

Unocal studied the problem extensively and concluded that, with the exception of Colombia, rebels in war-torn countries rarely destroy key elements of the economic infrastructure.

FORBES: Kabuled Together

Unocal studied the problem extensively and concluded that, with the exception of Colombia, rebels in war-torn countries don't destroy key elements of the economic infrastructure.

FORBES: Kabuled together

These key post-Cold War allies also saw it as a tangible expression of the U.S. commitment to their security in the face of assiduous Russian efforts to reassert a sphere of influence that would turn the clock back, reestablishing in some form their unhappy status under the Kremlin's thumb.

CENTERFORSECURITYPOLICY: 'Reset' translates as 'capitulation'