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

作为衰老进程的一部分，它明显发生在老年男性身上。

《柯林斯英汉双解大词典》

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

在中国历法中，春分总是出现在二月份。

《柯林斯英汉双解大词典》

The same fluctuation back and forth occurs in areas other than intelligence.

同样的上下波动也发生在智力以外的领域。

youdao

Sudden heart failure occurs in approximately one out of 100,000 students each year.

VOA: standard.2009.12.12

Well, that process occurs in a series of steps and one of those kinds of steps is shown here.

这个过程的发生包含一系列步骤,而这些步骤中的一个步骤即如图所示

耶鲁公开课 - 生物医学工程探索课程节选

Fertilization of these two where these two cells join occurs in the distal part of the fallopian tube.

受精的过程,就是这两种细胞,在输卵管壶腹部相互结合

耶鲁公开课 - 生物医学工程探索课程节选

What will our government do if a double-dip recession occurs in the near future?

FORBES: U.S. Debt Bomb's Detonation Sped Up By Five Years

Natural radioactivity even occurs in foods such as carrots and bananas, and in beer.

WSJ: Radiation's Effect Depends on Amount

Meanwhile, the rotation that occurs in that post relative to other C-level executives continues.

FORBES: CMO Tenure Reaches 45 Months