factories与set up 构成谓宾关系
意思就是 要用被动语态
完成时的被动语态就是have/has been done
不能完全靠中文意思来理解的
defeat击败,战胜；使…失败；挫败的意思
defend防护；辩护 保护的意思
可以从意思上理解
还有就是 defeat 不与against连用的
processes复数时是加工；处理的意思（process的第三人称单数形式）
chemical process指特定的化学反应过程
chemical product指化学产品
senior high school English
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