114 年 國立臺灣大學農業化學系碩士班丙組《專業英文（F）》
第 5 題20 分
Please translate the following paragraph into Chinese (20%)
Understanding of how soil organic matter (SOM) chemistry is altered in a changing climate has advanced considerably; however, most SOM components remain unidentified, impeding the ability to characterize a major fraction of organic matter and predict what types of molecules, and from which sources, will persist in soil. We present a novel approach to better characterize SOM extracts by integrating information from three types of analyses, and we deploy this method to characterize decaying root-detritus soil microcosms subjected to either drought or normal conditions. To observe broad differences in composition, we employed direct infusion Fourier-transform ion cyclotron resonance mass spectrometry (DI-FT-ICR MS). We complemented this with liquid chromatography tandem mass spectrometry (LC-MS/MS) to identify components by library matching. Since libraries contain only a small fraction of SOM components, we also used fragment spectral cosine similarity scores to relate unknowns and library matches through molecular networks. This integrated approach allowed us to corroborate DI-FT-ICR MS molecular formulas using library matches, which included fungal metabolites and related polyphenolic compounds. We also inferred structures of unknowns from molecular networks and improved LC-MS/MS annotation rates from to by considering DI-FT-ICR MS molecular formula assignments. Under drought conditions, we found greater relative amounts of lignin-like vs condensed aromatic polyphenol formulas and lower average nominal oxidation state of carbon, suggesting reduced decomposition of SOM and/or microbes under stress. Our integrated approach provides a framework for enhanced annotation of SOM components that is more comprehensive than performing individual data analyses in parallel. (Adapted from Analytical Chemistry, 2024, 96: 11699-11706)
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題型定位與配分說明
- 題型：翻譯題（英譯中，佔 20%）。
- 出處：改寫自期刊《Analytical Chemistry》（2024 年，第 96 卷，頁 11699–11706）。
- 學科領域：土壤有機質化學（SOM chemistry）、儀器分析（質譜學 MS/MS、FT-ICR MS）、生物資訊與分子網絡分析（Molecular Networking）。
核心觀念
本題考驗考生對土壤化學與高階儀器分析學術英文的理解與翻譯能力。翻譯重點在於精準轉換專業術語、保持語意連貫，並符合台灣生命科學與農學學術界之中文用語習慣。
關鍵專業術語與定義：
- Soil Organic Matter (SOM)：土壤有機質。
- Microcosms：微宇宙／微觀生態系統／模擬實驗裝置。
- Direct Infusion Fourier-Transform Ion Cyclotron Resonance Mass Spectrometry (DI-FT-ICR MS)：直接進樣傅立葉轉換離子回旋共振質譜法（高解析度質譜，用於測定精確分子式）。
- Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)：液相層析串聯質譜法（用於比對資料庫與碎片結構分析）。
- Fragment Spectral Cosine Similarity Scores：碎片光譜餘弦相似度分數（用於分子網絡建構）。
- Molecular Networks：分子網絡（將未知的化學分子與已知庫存分子進行關聯分析）。
- Nominal Oxidation State of Carbon (NOSC)：碳之標稱氧化態（反映有機物被微生物分解與氧化程度的指標）。
- Annotation rate：註釋率（分析化學中將未知訊號比對確認其結構與化學式的比例）。
解題方法與句構剖析
針對本段英文翻譯，切入點為句型拆解與術語精準對譯：
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第 1 句（背景與問題設定）
- 原句：Understanding of how soil organic matter (SOM) chemistry is altered in a changing climate has advanced considerably; however, most SOM components remain unidentified, impeding the ability to characterize a major fraction of organic matter and predict what types of molecules, and from which sources, will persist in soil.
- 句構分析：主詞為 Understanding of...，受詞為包含 how 轉折的從屬子句；分詞構句
impeding the ability to...表結果。 - 關鍵對譯：soil organic matter (SOM) chemistry（土壤有機質化學）；characterize（表徵／分析特性）；persist（殘留／持久存在）。
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第 2 句（研究方法簡述與實驗設計）
- 原句：We present a novel approach to better characterize SOM extracts by integrating information from three types of analyses, and we deploy this method to characterize decaying root-detritus soil microcosms subjected to either drought or normal conditions.
- 句構分析：
by integrating...（透過整合……），對比subjected to either drought or normal conditions（遭受乾旱或正常條件處理）。 - 關鍵對譯：decaying root-detritus（腐爛的根系碎屑）；soil microcosms（土壤微宇宙／土壤微觀實驗系統）。
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第 3 句與第 4 句（分析技術 1 & 2）
- 原句：To observe broad differences in composition, we employed direct infusion Fourier-transform ion cyclotron resonance mass spectrometry (DI-FT-ICR MS). We complemented this with liquid chromatography tandem mass spectrometry (LC-MS/MS) to identify components by library matching.
- 關鍵對譯：direct infusion（直接進樣）；Fourier-transform ion cyclotron resonance mass spectrometry（傅立葉轉換離子回旋共振質譜法）；library matching（資料庫比對）。