问题描述：
Trading blocks是什么意思?
RT...
不明白什么意思!差字典无解!
原句：Trading blocks often espouse free trade between members but operate protective policies against third party states, i.e. the EU or NAFTA.
RT...
不明白什么意思!差字典无解!
原句：Trading blocks often espouse free trade between members but operate protective policies against third party states, i.e. the EU or NAFTA.
问题解答：
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