occurs

A burglary occurs every three minutes in London

伦敦每3分钟就会发生一起入室抢劫案。

Anaerobic respiration occurs only in particularly active tissues such as muscles during severe exercise .

厌氧呼吸只有在处于剧烈运动状态的肌肉等特别活跃的组织中才会发生。

One of the funniest episodes in the book occurs in Chapter 6 .

书中最有趣的片段之一在第6章。

When exactly did the incident occur ?

这一事件究竟是什么时候发生的？

Sugar occurs naturally in fruit .

水果天然含糖分。

Rattlesnakes occur in the warmer , drier parts of North America .

响尾蛇出现在北美温暖干燥的地区。

There will come a time when the crisis will occur .

危机总有一天会爆发。

It did not occur to me to check my insurance policy

我没有想到要核实我的保险单条款。

Such events occur only when the external conditions are favorable .

这种事情只有在外部条件有利时才会发生。

No one has suggested how this might occur

没人说得清这事是怎么发生的。

It never occurs to them to question the doctor 's decisions

他们从未想过要怀疑医生的决定。

Emergency cooling systems could fail and a reactor meltdown could occur .

紧急冷却系统有可能失灵，核反应堆有可能发生堆芯熔毁。

About two in every five epileptic fits occur during sleep

每5例癫痫病中约有两例是在睡眠过程中发作的。

It occurs in elderly men , apparently as part of the ageing process

这种情况出现在老年人当中，显然是衰老过程的一部分。

Changes in temperature occur slowly and are constrained within relatively tight bounds .

温度变化缓慢，而且局限在相对较小的范围内。

At least one supernova occurs per decade in our galaxy .

在我们的星系中每10年至少有一颗超新星出现。

I have known dramatic changes occur in the space of a few minutes with this method .

我知道用这种方法短短几分钟之内就能够产生急剧的变化。

The human brain needs to be without oxygen for only four minutes before permanent damage occurs .

人的大脑缺氧4分钟后便会造成永久性损伤。

The regularity with which this occurs suggests that the process is genetically determined .

这种现象出现的规律性表明这个过程是由基因决定的。

High levels of nitrate occur in eastern England because of the heavy use of fertilizers .

英格兰东部因大量使用化肥导致土壤硝酸盐浓度过高。

The cattle disease occurs more or less anywhere in Africa where the fly occurs

在非洲凡是有这种蝇虫的地方，几乎都会出现这一牛病。

In the Chinese calendar , the Spring Equinox always occurs in the second month .

在中国历法中，春分总是出现在2月。

If these drugs are stopped abruptly then some withdrawal symptoms may occur .

如果突然停服这些药，则可能出现一些戒断症状。

When hay fever first occurs it is often mistaken for a summer cold .

花粉病初期常被误认为是风热感冒。

The cry occurs when air is brought into contact with the baby 's larynx

婴儿的喉咙接触到空气时，就会哭出来。

If headaches only occur at night , lack of fresh air and oxygen is often the cause

如果只是在晚上头疼，那常常是由于缺乏新鲜空气和氧气的缘故。

Although it is predominantly a teenage problem , acne can occur in early childhood

虽然粉刺多发于青少年时期，但也可能在刚进入童年时期就出现。

Curiously , the word ' gay ' does not occur in the index

奇怪的是，gay这个词没有出现在索引当中。

Unless you respect other people 's religions , horrible mistakes and conflict will occur .

如果不尊重别人的宗教信仰，就会祷下大错，酿成冲突。

Change occurs at a glacial pace .

变化极其缓慢。