1980年在中国当时有很少的迹象表明，引文索引法已为人知晓。
In 1980, there was little evidence that citation indexing was known in the People's Republic of China.
我同意了他的建议，因为引文索引法和引文分析的基本原理还没有改变。
I agreed to this proposition because the fundamental principles of citation indexing and analysis have not changed.
1980年我首次访问中国时，《引文索引法的理论和应用》刚刚问世不到一年。
When 1 first visited China in 1980, Citation Indexing was less than one year old.
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