The year of 1993 saw China turned from an oil export country into a net import one.
1993年，中国从石油出口国变为了石油净进口国。
Net import of virtual water in a water-deficient nation can relieve the pressure on the nation's own water resource.
缺水国家虚拟水的净进口能够缓解自身水资源紧缺的压力。
Net import of virtual water in a water-deficient nation can relieve the pressure on the nation's own water resource.
缺水国家虚拟水的净进口能够缓解自身水资源紧缺的压力。
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