n.骨干( backbone的名词复数 )，脊骨，骨气，脊骨状物...

backbones的音标：backbones的英式发音音标为：['bækbəʊnz]backbones的美式发音音标为：['bækboʊnz]...

Why do hummingbirds and gorillas both have backbones?为什么蜂鸟和大猩猩都有脊骨?They are vertebrates, that is, animals that have backbones.它们是脊椎动物, 即有脊骨的动物.Good service is our foundation and high quality drivers are our backbones.优质服...