| 1 | The disease is irreversible and progressive. | |
| 2 | The simple truth is that women are slow to warm up during sex. | |
| 3 | The disease is irreversible and progressive. It takes one or two decades for the disease to develop into a stage that results in clinical symptoms. | |
| 4 | A summarized the specific phenomenon, on one hand and elaborated two between the progressive relationship. | |
| 5 | The counterfeiting of banknotes is a global problem that is increasing in scale and sophistication. |