...Mnure, soil, biological sealing, bacteria, polysaccharide, plugging agent, levan [gap=725]关键词：肥料，土壤，生物密封，细菌，多糖，封堵剂，左（果）聚糖 ...
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Conclusion:①Percutaneous device with arch perforated flange can obviously reduce the stress at the exit as compared with traditional cylinder-shaped design, thus providing good mechanical circumstances for realization of biological seal.
结论：①带孔弧形圆盘状经皮器件与传统直杆状经皮器件相比，经皮处应力值明显降低，从而为经皮密封提供了良好的力学环境，有利于生物密封的实现。
参考来源 - 植入性大腿假肢经皮密封部位的动态应力分析及其初步动物实验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
这些生物要变成石油，必须被密封在岩石之中很长时间。
For there creatures to become oil, it was necessary that they should be imprisoned between layers of rock for an enormous length of time.
这些技术包括开放式池塘养殖藻类，以及将藻类培植在密封管中的生物反应器技术。
These will include open ponds as well as bioreactors, where the algae are grown in sealed tubes.
自1991至1993年，被密封在生物圈内的八个人与大自然以及它的研究方向作着艰苦的斗争。
Eight people sealed inside between 1991 and 1993 fought bitterly over the nature and direction of its research.
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