Varroa mites have been causing serious problems in bee colonies in the United States since the late nineteen eighties.
瓦螨已造成美国蜜蜂自19世纪80年代后期严重的问题。
The national union of teachers insists that this is minority causing serious problems in schools. And also argues that the figures were reflecting improved relationship between schools and police.
国家教师联盟坚持称，在学校引起严重问题的只是少数。他们还辩解称，这反映了学校和警察之间的关系有所改善。
Buffer overflows have been causing serious security problems for decades.
几十年来，缓冲区溢位一直引起许多严重的安全性问题。
In the Qing dynasty, a large number of immigrants Hubei Northwest mountain, they not only reclaim a lot of land, resettlement valuable forest resources, causing serious environmental problems.
在清代，大量移民涌入鄂西北山区，他们不仅开垦了大量的荒地，还垦殖了宝贵的森林资源，造成了严重的环境问题。
Scientists have made a breakthrough in understanding why a foetal blood vessel can fail to close shortly after birth, causing serious health problems.
科学家在理解为什么胎儿在出生后不久血管不能愈合这个问题上取得重大突破，该问题会导致严重的健康问题。
The unreasonable exploitation and utilization of water and soil resources is the radical reason of causing serious ecological environment problems in the west part of China.
水资源和土地资源的不合理开发利用是造成西部严重生态环境问题的根源。
There are prevalent irrational drug use problems all over the world, causing increasingly serious concern from most governments, which can be ascribed to both sides of drug market.
不合理用药是在全世界所有国家都存在的问题，已经日益引起各国关注，导致不合理用药主要原因是药品供需双方面的。
She became very serious after the kids started causing problems.
孩子们开始惹事的时候，她变得非常严肃起来。
No problem until snow came down and made the surface slippery, causing him some serious problems. '…or take a rope and jump for 15 minutes. ', he remembered. So he did.
知道下了雪地面变滑给他带来严重的困扰时，他开始选择15分钟跳绳。
No problem until snow came down and made the surface slippery, causing him some serious problems. '…or take a rope and jump for 15 minutes. ', he remembered. So he did.
知道下了雪地面变滑给他带来严重的困扰时，他开始选择15分钟跳绳。
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