The happening of debris flow is a complicated problem, and it is the outcome of polysynthesism coaction, this brought difficulty to analytical prediction of development trend of debris flow.

摘要泥石流发生与否是一个极其复杂问题，而且是由多种因素共作果，这也给泥石流活动发展趋势分析预测带来了难。

It is pointed out that the physiological and ecological characteristics of oligotrophic microbes and the coaction of physical-chemical and biochemical processes need further investigation.

滤层中贫营养微生物生理生态特性、物化与生化作等有待深入研究。

Abstract: The coactions of subsealing concrete and steel pipe pile are the key technology of large steel suspension-box cofferdam.

封底混凝土与钢护筒共作是大型钢吊箱及承台设计与施工关键技术问题。

Gymnast s Biohythm is that living things inherits the factor and long range specialized training coactions result.

体操运动员生物节律性是生物遗传因素和长期专项训练相互作果。