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Study



Columns Introduction of Study

Language Translation.png

Language Translation column belongs to Study Category of 18DAO online reference service. It introduces popular free language translation online. You can use them translate between more than 10 kinds of languages -- English, French, German, Spanish, Italian, Portuguese, Dutch, Russian, Chinese, Japanese ...

Idiom Dictionary.png

Idiom Dictionary column belongs to Study Category of 18DAO online reference service. Free Idiom Dictionary Online. Many of our idioms have been classified into topic groups. You can browse them using the categories and A-Z list.

History.png

History column belongs to Study Category of 18DAO online reference service. It provides World History Timeline, This Day In History and many more.

Periodic Table.png

Periodic Table column belongs to Study category of 18DAO online reference service. Providing color periodic table of the elements, and other chemical data online freely. You may check every elements' detail data. The column is a good helper for chemistry students and fans.

Encyclopedia.png

Encyclopedia column belongs to Study Category of 18DAO online reference service. It introduces popular encyclopedia online. You can use them to learn almost everything online.

Measure Conversion.png

Measure Conversion column belongs to Life category of 18DAO online reference service. Providing length, weight, volumn, temperature and many more conversion charts. You may find it's a useful tool.

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