| 1. | When the second plane hit the tower . .
当第二架飞机撞到世贸大厦时. . |
| 2. | Analysis of the collapse of world trade towers
美国世贸大厦破坏分析 |
| 3. | When the second plane hit the tower
当第二架飞机撞到世贸大厦时 |
| 4. | I work down town in world trade tower
我在市区的世贸大厦工作 |
| 5. | ' when the planes hit the twin towers ,
当那飞机撞上世贸大厦时 |
| 6. | When informed of the first plane hitting the world trade center
当被告知第一架飞机撞到世贸大厦的时候 |
| 7. | When informed of the first plane hitting the world trade center . .
当被告知第一架飞机撞到世贸大厦的时候. . |
| 8. | The collapse of world trade center and the maintenance of fireproof building structures
世贸大厦的倒塌与结构防火保护 |
| 9. | The hijackers flew two of the planes into new york city ' s world trade center
劫机者开着其中两架飞机撞上了纽约世贸大厦。 |
| 10. | Understand the importance of fireproof on steel structure project from wtb collapsed
从世贸大厦倒塌看钢结构防火的重要意义 |
