Failing states are of international concern because they are a source of terrorists, drugs, weapons and refugees ( ' , 难民), threatening political stability everywhere.
出自-2016年6月阅读原文
柯林斯高阶英汉双解学习词典释义
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武器;兵器
A weapon is an object such as a gun, a knife, or a missile, which is used to kill or hurt people in a fight or a war.
A weapon is something such as knowledge about a particular subject, which you can use to protect yourself or to get what you want in a difficult situation.