利用混合降解菌评价生物降解材料的生物降解性，天津南开大学，宋存江。
Novel Method to Evaluate the Biodegradability of Biodegradable Materials by a Group of Mixed Degrading-bacteria, Nankai University, Cunjiang Song.
今存《庆元条法事类》是一残书，但由于所收条法均是在两宋实行过的法律，且是集庆元二年以前所有编敕大成的律书，因此具有很高的史料价值。
Athough this extant book is incomplete nowdays, but since it collects all the rules and regulations of the Song Dynasty, So it is highly valuable historical material for us.
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