n.骨干( backbone的名词复数 )，脊骨，骨气，脊骨状物...

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...

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