Here is where the vital exchange occurs.

这就是关键交换之地。

That is when the greatest progress occurs.

这正是最伟大进步来时刻。

The irony is just occurring to me.

我也是刚意识到这件事有多讽刺。

There's so much material that a traffic jam occurs.

物质太多，都发拥堵了。

Two months later, something, something incredible occurs.

两个月后，难以置信事情发了。

Typically fatigue occurs in the later weeks of treatment.

疲惫感觉通常会在治疗后期出现。

Growing evidence supports inflammation as the foundation upon which disease occurs in our body.

越来越多证据表明炎症是我们身体疾发基础。

Radford and his colleagues wanted to investigate how that learning occurs.

拉德福德和同事想研究这种学习发过程。

There are a lot of theories as to why that occurs.

关于为什么会发这种情况，有很多理论。

So you can get out ahead of potential deforestation before it occurs.

你就可以在潜在森林砍伐发取行动。”

Most volcanic activity occurs where these plates collide.

大多数火山活动发在这些板块碰撞地方。

Sometimes the clot might dissolve on its own before permanent damage occurs.

有时，血块可能会在引起永久性损害之自行溶解。

Answer choice B. the presence of complex systems contradicts how evolution occurs.

B 选项说复杂系统存在与进化发过程相矛盾。

Then comes the chlorophyll-rich palisade mesophyll, where the bulk of photosynthesis occurs.

然后是富含叶绿素掌状中叶，大部分光合作用在这里发。

Most influenza deaths occur in developing countries and very few vaccinations occur there.

大多数流感死亡发在发展中国家，但那里居民很少接种疫苗。

Using the Ebird models combined with satellite data predicting where water naturally occurs.

使用 EBird 模型与卫星数据相结合，预测哪里会有自然降水。

There are three main ways by which heat transfer occurs, conduction, convection and radiation.

传导、对流和辐射。

But the surface inside the leaves where diffusion actually occurs is 6000 square meters.

但是实际上发扩散叶片内部表面为6000平方米。

Thus avoiding accidents that otherwise might have occurred.

从而避免可能会发事故。

Like that just wouldn't occur to them.

就像他们不会想到那样。