foreign technical assistance 对外技术援助 implementation of technical assistance 技术援助执行额 ..
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The work of Chinas economical & technical assistance to foreign countries has gone through three phases during 50 years or more.
美国对外经济援助的历史可以分成三个阶段，即冷战阶段、冷战后的过渡阶段和新世纪之初的反恐阶段。
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