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The 21st century is a big flow and big circulation age.
21世纪是大物流、大流通的时代。
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The pulmonary circulation is a system with high flow and low pressure.
肺循环是一个高流量、低压力的系统。
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The pulmonary circulation is a system with high flow and low pressure.
肺循环是一个高流量、低压力的系统。
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