首先这是一个it was...that强调句，强调的是主语，去掉之后，句子为The training that he had received in that well-known transnational company made him such a good sales manager.the training 是主语，其后跟了个that引导的定语从句，the training在定语从句中作receive的宾语，句子主干是the training made him such a good sales manager.意思是“他在那家有名的跨国公司里所接受的训练，使他成为了如此优秀的销售经理”
It was the training that he had received in that well-known transnational company that 整个是主语。接受著名国际公司的培训使他成为这么优秀的销售经理。that he had received in that well-known transnational co
