6．He also did pioneer work in the field of weatherobservation（觀察）．

分析 他在氣象觀察領(lǐng)域也做了不少開拓性的工作．

解答 答案：observation 考查翻譯填空．根據(jù)句意及句子結(jié)構(gòu)，要填入一個名詞，observation意為"觀察"．故正確答案是：observation．

點評 考查翻譯填空，準(zhǔn)確地翻譯句子、理解句子，然后根據(jù)句意及提示確定所填單詞詞性，寫出單詞完成句子，使句意更通順．

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