Conclusions After penetrating keratoplasty, the wounds of corneal graft show tectonic instability and poor resistance to tension.

结论穿透性角膜移植术后创口稳定性和抗张能力差，较小的外力打击可引起破裂。

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The main geological environmental problems include slope disasters, siltation of river courses and mouths, contamination of water and soils, tectonic instability and hidden karst collapses.

主要地质环境问题有斜坡灾害、河道、口门淤积，水土污染，构造稳定性和隐伏岩溶塌陷等。

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But at the same time, there is a lot of instability below the surface, where different age groups are grinding against one another like shifting tectonic plates.

ECONOMIST: The digressions of people power