It came into force in 1994. Daryl Kimball,Executive Director of the Arms Control Association, a private research firm, says that treaty helped end the Cold War.
VOA: standard.2009.12.07
I think that if a classroom devolves to the point where physical force is required to gain control,
我认为,如果一个课堂秩序十分混乱,以至于要用武力来维持秩序,
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