Indexing all that data is obviously expensive for reads, but also for writes.
显然，对所有数据编索引不仅对于读而且对于写都很耗时。
The first step in indexing data is to make it available in simple text format.
编制数据索引的第一步是让数据变成一个简单的文本格式。
When indexing data, two options are available.
在索引数据时有两个选项可用。
Indexing - create an index of web crawl data.
索引——创建网页检索数据索引。
The first problem is indexing the application data.
第一个问题就是索引应用数据。
The first problem is indexing the application data.
第一个问题就是索引应用数据。
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