何组卜辞材料比较零散，前人对它几乎没有过系统的综论。
Ho Group Oracle consists of fragmented material, its predecessors have almost no systematic review.
在前人对洋葱泥红变的研究基础上，研究了蒜泥绿变的机理。
Mechanism of greening of garlic purees was studied in the article, based on the previous studies of reddening of onion bulb purees.
本文在总结前人对礼貌研究的基础上，指出礼貌用语与文化密切相关。
This paper summarizes previous politeness studies and indicates the close relationship between politeness phenomena and culture.
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