| 1 | The easiest way to capture a fortress is from within. | |
| 2 | The enemy's fierce attack finally breached the wall. | |
| 3 | They kept bringing pressure on Lot and moved forward to break down the door. | |
| 4 | Yet the technology also has to overcome a few hurdles. | |
| 5 | The glass ceiling in Japan is known as the bamboo ceiling, and is even harder to break. |