She says bird flight has everything to do with the shape and size of a bird's sternum, or breastbone.

她表示，鸟的飞行与鸟胸骨的形状和大小有很大关系。

It also didn't have the large breastbone of modern birds.

它也没有现代鸟类的大胸骨。

It also didn’t have the large breastbone of modern birds.

它也没有 现代鸟类的大胸骨。

And it was sliced right down to my breastbone.

它被切成薄片直到我的胸骨。

It is not easy to crack clean into breastbone.

直接敲裂一个人的胸骨。

Yeah. He broke through the breastbone.

是啊 她胸骨裂开。

Cormorants don't need to fly away from threats, so selection has removed the need for big wings and breastbones.

鸬鹚不需要飞离威胁，因此自然选择消除了对大翅膀和胸骨的需求。

The surgeon makes an incision down the length of the chest, cutting through the breastbone to separate the rib cage and expose the heart.

外科医生会沿着胸部的长度做一个切口，穿过胸骨来分离肋骨并暴露心脏。

It also connects the ribs to the sternum (breastbone) and provides a structural base for the nose and the external ear.

肌肉系统使身体得以移动，其收缩产生的热量有助于（机体）保持恒定的体温。

Ichthyornis was clearly avian -- it had wings without claws, a short tail, and a large breastbone, like most modern birds do.

鱼鸟显然是鸟类——它有没有爪子的翅膀、一条短尾巴和一块大胸骨，就像大多数现代鸟类一样。

Ok, now the most common symptom of chronic gastroesophageal reflux disease is pyrosis, also called heartburn, which is a burning pain in the chest, just behind behind the breastbone.

慢性胃食管反流病最常见的症状是胃灼热，也叫烧心，就是胸骨后烧灼感。

It sits on top of the diaphragm, which is the main muscle that helps with breathing, behind the sternum - or breastbone, in front of the vertebral column, squished in-between two lungs, and is protected by the ribs.

（心脏）在膈肌（帮助呼吸的主要肌肉）上、胸骨后、脊柱前、两肺之间，被肋骨包围保护。