关于smostenergeticflie的百科

•       Hummingbirds(蜂鸟)areoneofnature’smostenergeticflie...

• 问题详情：      Hummingbirds(蜂鸟)areoneofnature’smostenergeticfliersandtheonlybirdstohover(盘旋)intheairbyrelyingontheirstrengthalone.      Nowscientistshavefoundthatitistheratio(比值)ofthebird’swinglengthtoitswidththatmakesthemsoefficie...
• 2020-12-3129645