小朋友们都见过美丽的长颈鹿吧,它们性情温顺,斯斯文文的就像一位优雅的绅士。长颈鹿的脖子特别长,你们知道这是为什么吗?在很久很久以前,长颈鹿的脖子并不是都这么长,由于地球气候和环境的不断变化,使得陆地上的低矮植物大量减少。那些脖子短的长颈鹿因为缺乏生存竞争的能力, The children have seen beautiful giraffes, they are gentle, Steven text is like an elegant gentleman. Giraffe’s neck is particularly long, do you know why? The giraffe’s neck was not as long as it was long ago, and the number of low-lying plants on the land was greatly reduced due to the changing climate and environment of the earth. Those giraffes with short neck because of the lack of ability to survive competition,