Synonym search looks for words that mean similar things. Use the tilde symbol before your keyword, like this: ~ eggplant.
同义搜索来寻找那些类似的信息，只须在你的关键词臆加一根波浪线，比如：~eggplant。
To make the new annotations available with keyword search, the synonym dictionary for this collection must be extended.
为了让关键字搜索可以使用新的注释，必须扩展这个集合的同义词词典。
One important issue to note: When I tried the big-RDF-database approach to such a synonym-driven search four years ago, I had a lot of trouble with performance.
有一点要注意，四年前我尝试用大型 RDF 数据库进行这种同义词驱动的搜索时遇到了很多性能问题。
One important issue to note: When I tried the big-RDF-database approach to such a synonym-driven search four years ago, I had a lot of trouble with performance.
有一点要注意，四年前我尝试用大型 RDF 数据库进行这种同义词驱动的搜索时遇到了很多性能问题。
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