目前国内钢铁企业普遍存在着氧气放散率较高的问题，造成大量的能源浪费。

The problem of high oxygen blow-off rate universally exists around the domestic iron and steel enterprises, which causes enormous loss of energy.

youdao

这再次暗示着打哈欠与氧气几乎没有关系。

Again the implication is that yawning has little or nothing to do with oxygen.

youdao

其他行星上没有氧气，这意味着这些行星缺乏保护生命体免受紫外线辐射的臭氧层。

The absence of oxygen on other planets means that those planets lack an ozone shield to protect life forms against UV radiation.

youdao

The cardiovascular system, which is the heart and the blood vessels which are responsible for and the blood and so this is responsible for moving blood around the body and the blood brings oxygen and nutrients to every part of the body, you know that.

心血管系统,包括心脏和血管,主要负责输送血液,即心血管系统负责将血液送至全身,血液会带着氧气和营养物质,到身体的每一个部分,你懂的

耶鲁公开课 - 生物医学工程探索课程节选