Two things account for its occurrence.是什么意思？

Two things account for its occurrence.

发生这件事的原因有两个。

two

n. 两个，两个东西，两点钟，一对；adj. 两个的，我

例句
He has been absent from his desk for two weeks...
他已经有两个星期没有坐在办公桌前了。

things

n. （个人的）用品，需要的东西，生物，事实，物（ thing的名词复数 ）；

例句
Talk things through in stages. Do not accuse or apportion blame.
把事情按部就班地讲清楚。不要责难或归罪于人。

account

n. 账，账目，存款，描述，解释；v. 认为是，视为；

例句
I had two accounts with Natwest, a savings account and a current account.
我在国民威斯敏斯特银行有两个账户，一个储蓄账户和一个活期存款账户。

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

its

pron. (it的所有格形式)它的，厥；

例句
The government is to accelerate its privatisation programme.
政府将加快其私有化计划的进程。

occurrence

n. 发生，出现，遭遇，事件；

例句
The food queues have become a daily occurrence across the country.
排队购买食品的长龙已成了全国各地每日可见的景象。