1. One disadvantage of living in a big city is the high cost of living.
住在大城市的一个缺点是生活成本高。

2. One disadvantage of online shopping is the lack of personal interaction with sellers.
网购的一个缺点是缺乏与卖家的个人互动。

3. A disadvantage of working from home is the difficulty in separating work and personal life.
在家工作的一个缺点是难以分开工作和个人生活。

4. One disadvantage of using public transportation is the lack of flexibility in travel times.
使用公共交通的一个缺点是旅行时间的灵活性不足。

5. A disadvantage of studying abroad is being far away from family and friends.
出国留学的一个缺点是远离家人和朋友。

6. One disadvantage of relying on technology for communication is the potential for misinterpretation of messages.
依赖技术进行沟通的一个缺点是信息可能被误解。