In order to probe into laws on formation of natural gas hydrates in porous medium, natural gas hydrates have been formed through mixtures of ice powers and quartzes in experiments.
为了探讨多孔介质中天然气水合物原位形成规律性，进行了将冰粉和石英砂混合并形成天然气水合物的实验研究。
In order to keep up with the pace of moving to medium-sized cities, in order to come to our city to discuss business and tourism guests have a good place to go.
为了跟上向中等城市迈进的步伐，为了来我市洽谈商务和旅游观光的客人有个好的去处。
In order to protect environment, nowadays many large and medium-sized cities in China have forbidden the use of small coal-fired boilers, which is a blow to most of bath centers.
出于环境保护要求，目前我国许多大、中城市已明令禁止使用小吨位的燃煤锅炉，这对于大多数洗浴中心来说，是一个不小的打击。
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