1.When answering this question, consider the reasons why people might talk loudly on public transport. Some people may not be aware of their volume, especially if they are engaged in an exciting or emotional conversation. Others might not realize how their voice carries in a confined space. 2.You can also discuss cultural differences, as norms regarding public behavior can vary widely. Additionally, some individuals might talk loudly due to hearing impairments or because they are using headphones and are unaware of their volume. It's also possible that some people are simply inconsiderate of others around them.

1. 在回答这个问题时，考虑人们在公共交通工具上大声说话的原因。有些人可能没有意识到自己的音量，尤其是当他们参与激动或情绪化的对话时。还有些人可能不知道自己的声音在封闭空间里传得很远。 2. 你也可以讨论文化差异，因为关于公共行为的规范可能有很大不同。此外，有些人可能因为听力障碍或戴着耳机而不知道自己的音量。也有可能一些人只是对周围的人缺乏考虑。