| 1. | The walls of york were strong defences .
约克郡的城墙曾经是坚固的防御工事。 |
| 2. | It is important that the equipment be very rugged .
设备须非常坚固是重要的。 |
| 3. | The bridge looked long and solid .
那桥看起来又长又坚固。 |
| 4. | We are on board a stout ship .
我们坐的是一艘坚固的巨轮。 |
| 5. | This bridge is very solidly built .
这座桥造得很坚固。 |
| 6. | Here the enemy's defences were the most formidable .
这里敌人的防御工事是最坚固的。 |
| 7. | The material must be moderately coherent and firm .
材料必须有适度的粘着力和坚固性。 |
| 8. | The dam was not strong enough to hold back the flood waters .
水坝不够坚固，挡不住洪水。 |
| 9. | The gauge is firmly fixed to a part of the structure .
应变仪坚固地固定于结构的一个部位上。 |
| 10. | The frame of an airship is made of light but strong metal .
飞船的框架是用轻而坚固的金属制成的。 |
