The root causes of urban health problems are known.
城市卫生问题的根本原因众所周知。
These problems have two causes, the smaller of which is lack of money.
问题的症结有二，其中次要原因是资金不足。
The size of an egg rarely causes problems for the bird.
蛋的大小对禽类来说几乎不算什么问题。
Lack of communication causes serious problems and their marriage is a case in point.
缺少交流会导致非常严重的问题，他们的婚姻就是一个例子。
The causes of the problems are several.
问题的原因是多方面的。
My computer often catches a virus and causes a lot of problems.
我的电脑经常感染病毒，带来了很多问题。
The second part: present situation, problems and causes of employment problem in China.
第二部分，当前我国就业的现状、问题及原因。
The causes of mental health problems often vary a lot from one case to another.
精神健康问题的起因经常变化很多从一个案件到另一个。
The causes of mental health problems often vary a lot from one case to another.
精神健康问题的起因经常变化很多从一个案件到另一个。
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