backbones的例句（backbones在句子中的用法）

• Good service is our foundation and high quality drivers are our backbones. 优质服务是强生立足之本,高素质司机是强生之脊梁.
• They are vertebrates, that is, animals that have backbones. 它们是脊椎动物, 即有脊骨的动物.
• Why do hummingbirds and gorillas both have backbones? 为什么蜂鸟和大猩猩都有脊骨?