有两个方面的因素可以增加你训练时肌肉能利用的氧气量，第一是你的心脏变得更强，能输送更多的氧气，第二就是你腿部的肌肉能更好的利用氧气。
As you train, two things happen to improve your muscles' ability to use oxygen. First, your heart gets stronger and delivers more oxygen; and second, your leg muscles get better at using the oxygen.
你的心血管系统是一组重要而脆弱的结构，它输送你身体富含营养和氧气的血液。
Your cardiovascular system is an important and fragile group of structures that pumps nutrient - and oxygen-rich blood throughout your body.
但问题是它远在250000英里之外，不能与地球通讯的地方，并且你一定要不停地更换氧气瓶保证供氧！
The problem is that it's 250, 000 miles away, out of communication with Earth, and you definitely need non-stop oxygen bottles!
但问题是它远在250000英里之外，不能与地球通讯的地方，并且你一定要不停地更换氧气瓶保证供氧！
The problem is that it's 250,000 miles away, out of communication with Earth, and you definitely need non-stop oxygen bottles!
最引人入胜的是海底漫步，你可以戴着潜水用的氧气头盔漫步在洋底，徜徉在珊瑚和成群的条纹鱼中间。
Most intriguing is underwater walking in which wearing an oxygen helmet you meander along the ocean bed among coral and shoals of striped fish.
看到火焰在空气中舞蹈，你认定火是一种气体，就像氧气或者二氧化碳一样。
Watching a flame dance through the air, you might conclude that fire's a gas, like oxygen or carbon dioxide.
最引人入胜的是海底漫步，你可以戴着潜水用的氧气头盔漫步在洋底，徜徉在珊瑚和成群的条纹鱼中间。
Most intriguing is. underwater walking, in which, wearing an oxygen helmet, you meander along the ocean bed among coral and shoals of striped fis.
在这个范例中，冒出的是氧气气泡，它基本上是由基因控制，你可以控制多种材料，来提高设备性能。
In this case, you're seeing oxygen bubbles come out. And basically by controlling the genes, you can control multiple materials to improve your device performance.
为供应充足的氧气来维持你的身体之需，你的心脏是怎样努力工作的呢？或者它跳动得有多快呢？
How hard does your heart have to work-and how fast does it have to pump-to get oxygen-rich blood throughout your body?
为供应充足的氧气来维持你的身体之需，你的心脏是怎样努力工作的呢？或者它跳动得有多快呢？
How hard does your heart have to work-and how fast does it have to pump-to get oxygen-rich blood throughout your body?
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