And there are many reasons for this, our success in eliminating infectious diseases as causes in the developed world.
还有很多原因,在发达国家我们成功地消灭了感染性疾病
Now let's look at what the present day holds the leading causes of death now and this is probably something that you'll also know.
我们再来看看如今的,主要死亡原因,这个你们大概也都知道
I just wanted to show you this last graph, or this last set of statistics to go from causes of death in the U. S.
我想让你们看的最后一张图,或者说最后一组统计数据,不是关于美国人的死因
This is a phenomenon about the misattribution for the causes of arousal.
这个现象,这是一个产生性觉醒错觉的现象。
Force causes acceleration and this is a precise statement.
力产生了加速度,这是一个精确的说法
In this case, a receptor tyrosine kinase is a receptor molecule that binds a ligand at its surface outside the cell and initiates this enzyme activity - this kinase activity - and causes phosphorylation of another molecule.
在这个例子中,酪氨酸激酶受体可以,在细胞表面区域与配体结合,从而激发出,激酶的活性,使其能够磷酸化另一类分子
If you have two different ligands stimulating two different receptors, and one causes activation of this enzyme and generation of cyclic AMP, cyclic AMP levels will start to rise.
如果有两种不同的配体,刺激不同的受体,一种能够活化酶,并促进生成cAMP,cAMP的水平就会升高
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