数千人如何用英语表示

thousands of people

hundreds of people 成百上千
thousands of people 成千上万

thousands of people表示成千上万的人，thousand后面的s不可少，这样才能表示“数千”的复数含义，单独表示成千上万即“数千”可以是thousands upon thousands。

thousand of people

thousands of people

thousands of people