你还在把人山人海翻译成people mountain people sea吗？这可是chinglish中式英语，说出去会闹笑话的。

【正确表达】

人山人海的地道表达应该是 a sea of people.

crowd 也是人群的意思，如果想表示人很多，我们也可以说 huge crowds of people，意思也是人群拥挤。

【例句】

There are a sea of people at the train station during the Spring Festival travel season.

春运期间的火车站里人山人海。