Cách sử dụng
The expression "touch on" means to briefly mention or speak about a particular topic. It can be used in conversations, presentations, or writing to introduce or refer to a topic without going into great detail. For example, in a conversation about travel, you might touch on the topic of language barriers when visiting a foreign country. It's a useful expression for when you want to give a small amount of information or emphasize a specific point without getting too deep into the subject.