The main transformer has been operated well since it was put into use in 2000.
主变压器自2000年投产以来，工作状况良好。
The policy of coal base construction has been operated for nation's energy security.
为了保证我国的能源安全，国家已经出台政策，开展煤炭基地建设。
The project has been operated perfectly for one year and realizes water saving target.
应用一年多节水效果显著，实现了节水目标。
Sometimes the the repayment will start when the project has been operated for a period.
有时，项目投产一段时间才开始还款。
It has been proved that various causes operated to bring about the accident.
已经证实引起这次事故的原因是多方面的。
It has been proved that the bottom cause operated to bring about the accident.
已经证实引起这次事故的根本原因。
It has been proven by practice that the excavator operated satisfactorily after engine replacement.
实践证明，换装发动机后挖掘机的使用效果良好。
She has never been operated on before.
她从未动过手术。
She has never been operated on before.
她从未动过手术。
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