简单地说，公司总是受到两种约束之一的制约。
Simply, companies are always constrained from such growth by one of two constraints.
这个非常简单的程序声明了两个决策变量：约束和目标函数。
This very simple program declares the two decision variables: the constraint and the objective function.
派生的简单类型约束了基类型的值。
A derived simple type constrains the values of its base type.
在这个问题中，你将在确定的规则和约束条件下构建一个简单的积木世界。
In this problem you will model a simple block world under certain rules and constraints.
可创建简单的约束表达式，用简单条件检查数据；
You can create a simple constraint expression to check data for a simple condition;
可创建简单的约束表达式，用简单条件检查数据；
You can create a simple constraint expression to check data for a simple condition;
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