随着运移作用的加强，含氮化合物绝对浓度下降，“屏蔽”型与“暴露”型或“半屏蔽”型化合物的比值增加。
With the increasing of oil migration effects, the concentration of nitrogen compounds decreased whereas the ratios of shielded nitrogen compounds to exposed or semi-shielded ones increased.
随着运移作用的加强，含氮化合物绝对浓度下降，“屏蔽”型与“暴露”型或“半屏蔽”型化合物的比值增加。
With the increasing of oil migration effects, the concentration of nitrogen compounds decreased whereas the ratios of shielded nitrogen compounds to exposed or semi-shielded ones increased.
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