It's possible that marital instability reflects stress within the family system, which may influence children's sleep problems directly or through parenting, Mannering said.
曼纳林还表示婚姻的不稳定可能反映出家庭系统中的压力，而这种压力可能直接或在育儿过程中引起孩子的睡眠问题。
The last two factors induce borehole instability both by affecting stress distribution around wellbore and material properties of rock.
但后两者都是影响井壁应力分布和岩石力学性能而造成井壁不稳定。
If the stress that ACTS on shale around wellbore exceeds its intensity, borehole instability will happen.
当井壁岩石所受的应力超过其强度时就会发生井壁失稳。
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