He refers to the story from the Sermon onthe Mount about how houses builton sand fall, while those built on rock remain standing.
他引用的是“登山宝训”的故事，里面说，建在沙上的房子会倒，建在岩石上的房子依然屹立。
2
After that collapse, Mr Skilton said he was unconcerned and insisted the house was builton solid rock.
据房屋原来的主人斯基尔顿先生透露，在那次的塌陷之后，他还以为屋子是结结实实的建在坚固的岩石之上。
3
The current stratovolcano-a cone-shaped volcano built from successive layers of thick lava flows and eruption products like ash and rock fragments-is built on top of an older stratovolcano.