| 1. | In these crowded centers, the labor movement took form .
在这些人烟稠密的城市中，劳工运动逐渐形成。 |
| 2. | These two men traveled for three days, and found people and houses without number .
这两个人在岛上跑了三天，所到之处人烟稠密，屋宇毗连。 |
| 3. | To avoid visiting crowded places with poor ventilation
避免前往人烟稠密的地方。 |
| 4. | E to avoid visiting crowded places with poor ventilation
避免前往人烟稠密的地方。 |
| 5. | Avoid visiting crowded places with poor ventilation ; and
避免前往人烟稠密的地方； |
| 6. | Avoid visiting crowded places with poor ventilation
避免前往人烟稠密的地方 |
| 7. | Avoid crowded places
避免前往人烟稠密的地方。 |
| 8. | Avoid crowded places with poor ventilation if you are feeling unwell
如有不适，避免去人烟稠密和空气流通欠佳的地方。 |
| 9. | To avoid visiting crowded places with poor ventilation , especially during peak influenza season
保持空气流通避免前往人烟稠密的地方。 |
