The principal cause is unemployment, which has risen past 10%, as well as increasing Numbers of people who have had their hours cut back or been forced in to minimum wage jobs.
这主要是由于失业率已上升到超过10%，以及越来越多的人工作时间被削减或被迫从事只拿最低工资的工作。
2
Reasonable program for field pumping and rejecting development is put forward according to magnitudes and orientations of the maximum and minimumprincipal stresses.
依据最大、最小主压应力大小和方向，为油田注采开发等提供合理化方案。
3
The Mohr-Coulomb model is based on plotting Mohr's circle for states of stress at failure in the plane of the maximum and minimumprincipal stresses.