The development of relation between man and nature has undergone three stages.
人与自然的关系已经历三个阶段。
Since 1990S consumption regulation in China has undergone three stages of changes from retrenchment to neutrality, then to expansion.
90年代以来 ，我国的消费调控由紧缩性到中性再转变为当前的扩张性 ，对促进经济持续、稳定增长起到了重要作用。
The relation between man and nature has undergone three stages, that is, fishing-and-hunting civilization, agricultural civilization and industrialized civilization.
人地关系经历了渔猎文明、农业文明、工业文明三个阶段。
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