The new method quantifies the time parameters with L-R triangular fuzzy number, and identifies the critical path through ranking method of fuzzy number.
新方法将L-R三角模糊数引入到网络时间参数计算，并且采用模糊数大小排序的方法确定关键线路。
Potato (Solanum tuberosum. L) is one of the most important crops in the world ranking fourth after rice, wheat and maize, and plays a significant role in economy.
马铃薯是仅次于水稻、小麦、玉米的世界第四大粮食作物，在国民经济中具有重要作用。
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