The load combination is complex with consideration of the effect of asymmetry distribution of live load, snow accumulation and horizontal seismic load.
且考虑了屋面活载不均匀效应、雪压堆积效应和水平地震作用的影响，荷载组合复杂。
2
Oil migrated from higher potential belts to lower ones in "centrifugal flow", which was the regional dynamic condition of controlling petroleum accumulation and distribution.
油气由高势区向低势区呈“离心”式运移，这正是控制油气呈环、带状聚集与分布的区域动力学条件。
3
The strong tectonic stress not only changes the reservoir properties but also directly controls hydrocarbon accumulation and distribution.