Direction: Read the article "The Meaning of Movie Ratings" carefully, and then give proper definition to the red words in the article. Pay attention to speech of the words. (注明单词的词性) guardian
【简答题】When an ant dies, other ants move the dead insect out. Sometimes, the dead ant get moved away very soon—within an hour of dying. This behavior is interesting to scientists, who wonder how ants know fo...