1.Coupled unsaturated flow in claystone has high effect on strength and stability of underground engineering.

1.非饱和渗流、应力耦合行为是影响工程岩体的强度和稳定性的重要素。

2.Whittled by a half million years of wind and rain, the haunting claystone hills and buttes of Badlands National Park rise above the surrounding sea of grasslands.

2.历经了50万年的风吹雨打后，恶地园的黏岩丘陵与孤山矗立在一片草原之海中。