2018年考研英語長難句分析每日一句(740)

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In general, the tests work most effectively when the qualities to be measured can be mostprecisely defined and least effectively when what is to be measured or predicted can not bewell defined.
    【分析】
    多重復合句。and連接兩個并列的狀語most effectively 和 least effectively。兩個 when引導時間狀語從句,不定式短語to be measured作后置定語,修飾 the qualities;第二個when引導的時間狀語從句,又嵌套what引導的主語從句。翻譯時,按照漢語表達習慣,兩個when引導的時間狀語從句均前置,分別譯于兩個主句之前;to be measured譯為the qualities的前置定語。
    【譯文】
    一般地說,當所要測定的特征能很精確地界定時,測試最為有效;而當所要測定或預測的東西不能明確地界定時,測試的效果則最差。