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，都发生拥堵了。

Two months later, something, something incredible occurs.

两个月后，难以置信事情发生了。

Typically fatigue occurs in the later weeks of treatment.

疲惫感觉通常会在治疗后期出现。

Can you remain tranquil until right action occurs by itself?

能安以久，动之徐生？

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病发生基础。

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

拉德福德和同事想研究这种习发生过程。

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

关于为什么会发生这种情况，有很多理论。

Most volcanic activity occurs where these plates collide.

大多数火山活动发生在这些板块碰撞地方。

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

你就可以在潜在森林砍伐发生前采取行动。”

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前自行溶解。

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生过程相矛盾。

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生。

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

大多数流感死亡发生在发展中国家，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。

The 14th-century historian Ibn Khaldun believed that history occurs in cycles over four generations.

14 世纪历史家伊本·赫勒敦认为，历史在四代人之间循环往复。

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

但是实际上发生扩散叶片内部表面为6000平方米。