第三方物流将是现代供应链及物流系统的主要存在形式；
The third-party logistics distribution system will become the main trend in this field.
乌江流域溶解无机氮含量较世界平均水平高，其主要存在形式为硝态氮（NO_3-N）。
The dissolved nitrogen (DIN) concentrations in the Wujiang River basin were much higher than the global average values and the main form of nitrogen was nitrate nitrogen (NO3-N).
热塑性塑料的消费量日趋增大，而PVC作为热塑性塑料的主要存在形式，其废弃量相当大。
The consumption of the plastics including PVC is enlarge gradually, and their abandon the deal is very big. Therefore, the plastics of PVC of reborn circulating must be noted.
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