化合物各种常见性质的检索对化学化工工作者十分重要。
It is important for chemical researchers to search various physiochemical properties of compounds in their work.
本文通过检索文献，对苯脲类、酰基脲类、酰基硫脲类及四唑类化合物的生物活性作了系统的论述。
By retrieving concerned Literatures, this article discussed comprehensively the biological activities of phenyl ureas, acyl ureas and tetrazoles.
检索记录数达数百万以上的化合物名称或文献数据库时，全文检索效率将变得很低。
For the full-text searching in compound name or literature databases, the searching efficiency will become evidently low when the record number achieves millions.
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