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《化学文摘》和《核科学文摘》中的累积主题索引,乃是一种特殊形态的机编词串式关节索引。其检索效率不是通过索引语言的一般检全、检准措施获得的。这种索引由于利用了题外关键词索引的形态结构和特殊的句法规则,既便于阅读,又不失自然语言的专指度。《化学文摘》和《核科学文摘》在我国都是广为利用的检索工具。但对它们的累积主题索引的一般阅读方法尚有许多不熟悉者。为有助于读者克服这方面的障碍,
Cumulative theme index in Chemical Abstracts and Nuclear Science Abstracts is a special form of machine-coded word string joint index. Its retrieval efficiency is not obtained through the general inspection and indexing of indexing language. This index due to the use of the topic of foreign key words index structure and special syntax rules, both easy to read, without losing the degree of natural language. Chemical Abstracts and Nuclear Science Abstracts are widely used search tools in our country. However, there are many unfamiliar readers of the general way of reading their cumulative subject index. To help readers overcome these obstacles,