However, there are serious issues, such as a waste of resource, disordered mining and environment pollution during development of coal resource.
但在煤炭资源开发过程中，尚存在着资源浪费，开发秩序混乱以及环境污染等严重问题。
When I was in a class which was ever used to re-prepare for NMET, When I was in an environment so disordered that no one can even bear, I got to know a friend, I used to call him "Bear".
在我上复读班的时候，在那个现在想来极度混乱的环境里，我认识了个好朋友，我叫他熊。
Additionally, the influence of such factors as disordered medium, pumping sources and external environment on the lasing threshold is discussed.
并研究了随机介质、泵浦源以及外部环境等因素对随机激光阈值特性的影响。
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