The most serious problem was the worsening of external unbalance.
经济中最突出的问题是外部失衡不断加剧。
Was noise pollution a serious problem before the closing of the old factory?
旧工厂关闭之前噪音污染是个严重的问题吗？
I have never come to the idea that this was the first time I had serious problem with my boss.
我从没有想到过这会是我和老板打交道时第一次出现了严重问题。
I knew it was serious problem. It's not the end yet.
我知道这是个严重的问题，而且还没结束。
More serious was the problem of environmental pollution.
更为严重的是环境污染问题。
At that time, hunger was a serious problem in many parts of the countryside.
当时，饥饿是许多农村地区存在的严重问题。
It was not anticipated that the problem of farmers losing land would become so serious.
失地农民问题的出现，是始料不及的。
The problem of cementing quality was especially serious before 2004.
在2004年以前固井质量问题尤为突出。
The problem of cementing quality was especially serious before 2004.
在2004年以前固井质量问题尤为突出。
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