which has its restriction
这是有限制的
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Because equilibrium assignment model has large number of variables and restriction conditions, it is difficult to solve it, which affects its application.
对于均衡分配模型，由于变量较多、维数太大、约束条件太多，使得模型的求解较为困难，影响了在实际中的应用。
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The company, however, has now neatly defused this restriction by setting up its own distribution company, Walls Direct which deals directly with retailers.
ECONOMIST: Competition: Ice-cream wars | The
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