The overall result has been to make entrance to professional geological journals harder for amateurs, a result that has been reinforced by the widespread introduction of refereeing, first by national journals in the 19th century and then by several local geological journals in the 20th century.
詞匯點撥：
reinforced 加強
introduction 引入和制定
refereeing 推薦制度
journal 期刊
句子解析：
主干識別：The overall result has been to make entrance to professional geological journals harder for amateurs 主系表結(jié)構(gòu)。
The overall result主語
has been系動詞
to make entrance to professional geological journals harder for amateurs
不定式做表語
其他成分：a result 同位語(補充說明前面的表語)
that has been reinforced by the widespread introduction of refereeing, first by national journals in the 19th century and then by several local geological journals in the 20th century.
(定語從句補充說明result)
參考譯文：這樣一來總的結(jié)果便是業(yè)余愛好者想在專業(yè)地質(zhì)學(xué)期刊上發(fā)表文章就更難了，而被廣泛使用的論文評審?fù)扑]制度又進一步強化了這一結(jié)果，該種制度先被19世紀(jì)的刊物引入，在20世紀(jì)，又被幾家地方級地質(zhì)學(xué)刊物所使用。
詞匯點撥：
reinforced 加強
introduction 引入和制定
refereeing 推薦制度
journal 期刊
句子解析：
主干識別：The overall result has been to make entrance to professional geological journals harder for amateurs 主系表結(jié)構(gòu)。
The overall result主語
has been系動詞
to make entrance to professional geological journals harder for amateurs
不定式做表語
其他成分：a result 同位語(補充說明前面的表語)
that has been reinforced by the widespread introduction of refereeing, first by national journals in the 19th century and then by several local geological journals in the 20th century.
(定語從句補充說明result)
參考譯文：這樣一來總的結(jié)果便是業(yè)余愛好者想在專業(yè)地質(zhì)學(xué)期刊上發(fā)表文章就更難了，而被廣泛使用的論文評審?fù)扑]制度又進一步強化了這一結(jié)果，該種制度先被19世紀(jì)的刊物引入，在20世紀(jì)，又被幾家地方級地質(zhì)學(xué)刊物所使用。