问题描述：
英语翻译
While no major agreementwas signed by the United Statesand the Soviet Union in Reykjavik,the two countries made progress in arms control talks in areas that are a central concern to America's European allies.Those particular areas involve disarmament proposals made in Iceland,affecting medium-range missiles and long-range missiles over which allies havevoiced some reservations.This was a major topic of discussion with ChancellorKohl today,even though his Foreign Minister was briefed by the US Secretary ofState only last week.In remarks welcoming Chancellor Kohl,President Reagan sounded a positive note,saying that therewas ample reason for optimism."When the next agreement is finallyreached with the Soviet Union,and I say when,not if,it will not be the result of weakness of timidity on the part ofWestern nations.Instead,it will flow from our strength,realism andunity."
此段怎么理解和翻译?
（1）第二句中reservations是什么意思?
（2）第三句 briefed
（3）引号句中...I say when,not if怎么理解?
（4）末尾flow from our strength何解?
While no major agreementwas signed by the United Statesand the Soviet Union in Reykjavik,the two countries made progress in arms control talks in areas that are a central concern to America's European allies.Those particular areas involve disarmament proposals made in Iceland,affecting medium-range missiles and long-range missiles over which allies havevoiced some reservations.This was a major topic of discussion with ChancellorKohl today,even though his Foreign Minister was briefed by the US Secretary ofState only last week.In remarks welcoming Chancellor Kohl,President Reagan sounded a positive note,saying that therewas ample reason for optimism."When the next agreement is finallyreached with the Soviet Union,and I say when,not if,it will not be the result of weakness of timidity on the part ofWestern nations.Instead,it will flow from our strength,realism andunity."
此段怎么理解和翻译?
（1）第二句中reservations是什么意思?
（2）第三句 briefed
（3）引号句中...I say when,not if怎么理解?
（4）末尾flow from our strength何解?
问题解答：
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