CM 5th class

In this class, I got interested in the add-on, Research words.　This add-on help me to understand the meaning of unknown words. Just put the icon on the word, then click the right button of the mous, I can easily search it. Different from using electronic dictionary, I can search the word in wikipedia, or youtube, and it deepens my understandings. When I read the Difficult journal, this tool will really help me understand the meaning and detailed information.