1·Simultaneously, the gas control in roof caving and fully mechanized mining is the unsubstantial aspect of prevention measures for gas disasters in all over the world.
同时，放顶煤综采工作面的瓦斯治理也是世界各国煤矿瓦斯灾害防治技术的薄弱环节。
2·The fires happen very often in the central city zone of the metropolis. It's an unsubstantial aspect in the fire control management.
大城市的中心城区往往火灾多发，是消防管理中的薄弱环节。
3·Post-marketing drug assessment is now onset in our country, and the research is unsubstantial.
我国的药品上市再评价刚起步，在该领域的研究非常薄弱。
4·If undertaking improvement on unsubstantial technical sectors, it is expected a breakthrough in exploration of the coal seam gas in the Liupanshui area.
指出针对薄弱技术环节进行改进，六盘水地区煤层气勘探可望取得突破。