![Weknowthatmanyanimalsdonotstayinoneplace.Birds,fishand...]( "Weknowthatmanyanimalsdonotstayinoneplace.Birds,fishand...")
- 問題詳情： Weknowthatmanyanimalsdonotstayinoneplace.Birds,fishandotheranimalsmovefromoneplacetoanotheratacertaintime.Theymovefordifferentreasons:mostofthemmovetofindfoodmoreeasily,butothersmovetogetawayfromplacesthataretoocrowded.Whencoldweathercomes,...
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