关于中国灰化土的分类，特别是与美国灰化土分类的对比问题，目前国内外均存在分歧，这项研究尚有待深入进行。
There are some divergences of views on the classification of podzolic soils among in China and other countries and much work remains to be done in this respect.
关于中国灰化土的分类，特别是与美国灰化土分类的对比问题，目前国内外均存在分歧，这项研究尚有待深入进行。
There are some divergences of views on the classification of podzolic soils among in China and other countries and much work remains to be done in this respect.
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