Retrieval and statistics function + + complete.
完备的检索及统计功能。
Moreover, digital library has the function of text retrieval with images.
此外，数字图书馆还具有通过图像检索文本的功能。
The secondary function is consisted of calculating and retrieval operation.
设有计算和检索的辅助功能。
The secondary function is consisted of calculating and retrieval operation.
设有计算和检索的辅助功能。
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