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- The second stage, we use efficiency scores as explained variable and environmental variable as explainable variable, than calculate slack variable. 第二阶段以投入变数作为被解释变数，利用环境变数为解释变数，计算差额变量；
- The main idea of this paper is that by introducting slack variables, the authors transformate the problem into a nonlinear optimization with nonnegative constraints. 主要思想是通过引入松弛变量，将问题等价地转化为带非负约束的最优化问题。
- Demand is slack over the summer months. 夏季的几个月市场滞销。
- Slack up before you reach the crossroads. 驶近十字路口时要减低速度。
- A constant, variable, function name, or expression. 一种常数、变量、函数名或表达式。
- Slack off/up as youapproach the junction. 接近交叉口时要减速。
- Don't slack off in your studies. 不要荒费你的学业。
- Winter is the slack season at most hotels. 冬天是大多数旅馆的淡季。
- The prices are variable, shop around by all means. 价格高低不一，所以一定要货比三家逐店选购。
- The temperature was a variable in the experiment. 在该实验中温度是个变量。
- Not taut, firm, or compact; slack. 松弛的不紧、不严密或不坚实的; 放松的
- A finite increment in a variable. 变量增量变量的有限增量
- The speed of the toy boat is variable. 玩具船的速度是可变的。
- Winds are mainly light and variable. 风力较弱，风向多变。
- A programmed time delay of variable duration. 暂停，展宽一种由程序设置的可变持续时间的时间延迟
- After intense work in the summer, we are slack off now. 夏季紧张的工作过後，我们现在放松了。
- The sailors pulled at the rope to take up the slack. 水手们拉起绳索把它收紧。
- The tractor took up the slack and pulled the trailer out of the mud. 拖拉机拉紧拖缆把拖车从泥中拉了出来。
- slack variable 松驰变量,松弛变数
- January is always a slack period. 一月份总是萧条时期。
