英语语法分析

QBASIC was used to make procedure, structure of heat pipe was optimized with complex method on condition that the area of fixing heat pipe was invariable.

利用该模型，采用复合形优化法，用QBASIC语言编程，在安装热管的面积一定状况下对碳钢-水热管换热器的结构进行优化。