求翻译：自上世纪80年代投入运营，20多年以来其性能得到了巨大的改善。目前约有450MW槽式系统已投入运营，400MW项目正在建设，近7GW项目正在开发。是什么意思？

Since the operation in the 1980s, 20 years its performance has been a huge improvement. There are about 450MW trough system has been put into operation, 400MW project is under construction, nearly 7GW projects under development.

Since the 1980s in operation, more than 20 years have been tremendous in its performance improvement. There are currently about 450 MW trough-type system has been put into operation, 400 projects are under construction, MW GW nearly 7 projects in development.

Puts into service from on century 80's, since more than 20 years its performance had the huge improvement.At present approximately has the 450MW trough type system to put into service, the 400MW project is constructing, the near 7GW project is developing.

Been in operation since the late 80 's, more than 20 years since its a huge improvement in performance. At present there are about 450MW chute system was put into operation, 400MW project is under construction, near 7GW project is under development.

Since the operation in the 1980s, 20 years its performance has been a huge improvement. There are about 450MW trough system has been put into operation, 400MW project is under construction, nearly 7GW projects under development.