的意思 sterna

1. The sterna of birds are typically keeled for flight muscles to attach.
鸟类的胸骨通常有龙骨，以便飞行肌肉附着。

2. The sterna of fish are usually made up of multiple small bones.
鱼类的胸骨通常由多根小骨头组成。

3. The sterna of mammals are connected to the ribs for added support.
哺乳动物的胸骨与肋骨连接，以增加支撑。

4. The sterna is an important part of the skeletal system in vertebrates.
胸骨是脊椎动物骨骼系统中的重要部分。

5. Injured sterna can be repaired through surgery in some cases.
在某些情况下，受伤的胸骨可以通过手术修复。

6. The shape and size of sterna can vary greatly between different species.
不同物种的胸骨形状和大小可能会有很大的变化。