| 例句 |
The dam/roof is weakening and it could go at any time.大坝/屋顶越来越不牢固，随时有可能决堤/坍塌。The foundations of the building became unsteady.这房屋的基础变得不牢固了。The roof is structurally unsound.这个屋顶结构不牢固。That weld won't hold.那个焊接点不牢固。Both clay and sandstone are unstable rock formations.黏土和砂岩都是不牢固的岩石构造。 |