18块钱怎么说英语

In English, 18 yuan can be referred to as "18 yuan" or "18 Chinese yuan." You could also use the symbol for yuan, which is "¥" to refer to the currency. For example, you could say "18 ¥" to refer to 18 yuan in English. It's important to note that the yuan is the unit of currency used in China, so if you are speaking to someone who is not familiar with the Chinese currency system, it might be helpful to specify that you are referring to yuan, rather than using the symbol alone.