reflection 4

meta-search engine or subject directory is more effective in helping you find resources related to your research topic, because the two search engines have classified the answer. So whenever we enter the key words, these two search engines will be classified as good search results are displayed, that would be more convenient to our screening. If only the search engines rather than meta-search engine or subject directory, but the answer listed, and not classified, so the result is chaos, chaos we need to choose their answer in the result is a very troublesome work , meta-search engine and subject directory is not the same way, meta-search engine without their own search engine, which search other search engines is to answer, then the answer is classified, but is its own subject directory search engine, and the answers have been classified as completed, so the meta-search engine or subject directory can help us find what we want faster results.