關於smostenergeticflie的百科

•       Hummingbirds(蜂鳥)areoneofnature’smostenergeticflie...

• 問題詳情：      Hummingbirds(蜂鳥)areoneofnature’smostenergeticfliersandtheonlybirdstohover(盤旋)intheairbyrelyingontheirstrengthalone.      Nowscientistshavefoundthatitistheratio(比值)ofthebird’swinglengthtoitswidththatmakesthemsoefficie...
• 2020-12-3129645