Without a truly competitive marketplace, those big companies can raise costs, or slack off on offering good service, or keep their workers' wages too low.
没有一个真正的竞争市场，这些大公司就可以随意增加成本，或不再尽力提供好产品，或想方设法压低工人工资。
The gaiters are held tight against the side of the shoe without any slack.
鞋罩将紧贴鞋子侧面，无任何松动。
The algorithm solves the quadric programming problem without adding slack, remaining and artificial variables while its efficiency is very high and it operates very easily.
所运用的线性不等式组的一种旋转算法避免了通常处理二次规划问题所需的松弛变量、剩余变量和人工变量，操作简便、计算效率高。
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