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例句 DEFINITIVE EXAMPLES 权威例句〔proprietary〕We had to take action to protect the proprietary technology.我们必须采取措施保护专利技术。柯林斯高阶Environmentalists argue that more goods should be transported by rail.环境保护专家认为更多的货物应该由铁路运输。剑桥国际We need to get a timber/wood preservation specialist to look at this roof.我们需要请一个木料保护专家来看看这个屋顶。剑桥国际
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