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.

摘要泥石流的否一个极其复杂的问题，而且由多种因素共同作的结果，这也给泥石流活动展趋势的分析预测带来了难。

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.

滤层中贫营养微物理态特性、物化化的协同作等有待深入研究。

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

封底混凝土钢护筒的共同作型钢吊箱及承台设计施工的关键技术问题。

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

体操运动员的物节律性物遗传因素和长期专项训练相互作的结果。