Multiple optimal solutions to the linear programming problem by the simplex method for specific feasible regions sometimes might lead to a loss of efficiency.
用单纯形法求解线性规划问题的多最优解，对一类特殊的可行域，有时会导致失效。
Lead in linear incandescent lamps with silicate coated tubes.
白炽灯管（硅酸盐涂于灯管）所含的铅。
Linear exhibition spaces lead visitors from outside to sunken entrance patio, from exhibition hall to exit without any letup.
展厅布局的特点是以线性空间引导观众的流线，由地面下沉到入口庭院，再由出口上升到地面，展线一气呵成，流畅紧凑。
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