一位地质勘探工程师对光谱进行了分析之后，发现了新的露天煤矿。
A geological prospecting engineer who had made a spectral analysis of ores discovered a new open-cut coalmine.
一位地质勘探工程师对光谱进行了分析之后，发现了新的露天煤矿。（翻译为时间状语结构）
A geological prospecting engineer who had made a spectral analysis of ores discovered a new open-cut coalmine.
一位地质勘探工程师对光谱进行了分析之后，发现了新的露天煤矿。（翻译为时间状语结构）
A geological prospecting engineer who had made a spectral analysis of ores discovered a new open-cut coalmine.
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