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.

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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.

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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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