Secondly, vitamin D must become metabolically active, and this process also has two steps.

其次，维生素D需要有代谢活性，这一过程细分为两步。

The fat that tends to accumulate in the lower extremities, for example, the legs, the buttocks, much less metabolically active.

下肢堆积的脂肪，例如腿、臀部，代谢活性低得多。

It's a metabolically expensive organ to begin with.

首先，它是一个代谢昂贵的器官。

The immune system is metabolically expensive for the body to operate.

免疫系统对于身体的运作来说在代谢上是昂贵的。

Even though there are more lactotrophs that are larger and more metabolically active, the blood supply to the pituitary gland remains the same.

即便泌乳细胞数量增多、体积增大、代谢也更活跃，但垂体的供血并未相应增加。

The difference is when you exercise in a slightly cooler environment, there is less need for the body to expend energy metabolically to cool your system.

不同的是，当你在一个稍微凉爽的环境中锻炼时，身体就不需要消耗代谢能量来冷却你的人体系统。

And when they feel the stress of fresh, oxygenated air they often produce spores, which are metabolically inert and extremely resilient to the environment.

一旦感受到来自新鲜富氧的空气的刺激，他们便形成芽孢；芽孢新陈代谢缓慢，环境适应性极强。

He praised the Cell study as providing " overwhelming evidence" that these four sweeteners " are not metabolically inert, as many had previously assumed" .

他称赞《细胞》研究提供了 “压倒性的证据”，表明这四种甜味剂 “并不像许多人以前假设的那样具有代谢惰性”。

" When you have nine out of 10 adults being metabolically unhealthy, largely due to diet-related illnesses, you know we have a broken system, " Mozaffarian said.

" 当有十分之九的成年人新陈代谢不健康，且很大程度上是由饮食相关的疾病导致的，你就知道我们的系统已经崩溃了。"

And there aren't a ton of skinnymorph mammals out there, because it's an extreme body plan that may push the boundaries of what's metabolically possible.

而且那里没有大量的瘦身哺乳动物，因为这是一种极端的身体计划， 可能会突破新陈代谢可能的界限。

Metabolically, it causes our blood sugar to spike. And you a lot hear about people getting insulin-resistant. And it just-it messes up the whole blood sugar dynamic when we consume too much sugar.

在代谢方面，它会导致我们的血糖飙升。你经常听说人们会产生胰岛素抵抗。当我们摄入过多的糖时，它只会扰乱整个血糖动态。

Since there are more metabolically active lactotrophs around, they take up a larger proportion of the blood that supplies the pituitary gland, this increases the risk of ischemia in other cells of the pituitary as well.

由于泌乳细胞的新陈代谢相当活跃，它们占用了供应垂体的大部分血液，于是增加了垂体中其他细胞缺血的风险。