free system resources meaning in English

剩余系统资源
自由系统资源

Method to release any references to the control in order to free system resources
方法来释放对控件的引用，以释放系统资源。
Are methods that free system resources when a class leaves scope or is set to
与之相反， “析构函数”是在类离开范围或被设置为
Typically , code in such a method frees system resources that would not automatically be freed by the garbage collector
通常，此方法中的代码释放不能由垃圾回收器自动释放的系统资源。
Tip : always close the recordset object after using it , to free system resources . set the recordset object to nothing to completely eliminate it from memory
提示：当使用这个方法以后，我们通常要关闭记录集对象来释放系统资源。我们可以不对记录集对象设置任何值以使其在内存中不复存在。