竞赛用英语怎么说

"竞赛用英语怎么说" can be translated to "How to say competition in English".

If you are asking for the term used to describe competitions in English, it would be "competition". If you are looking for phrases or sentences related to participating in a competition, some examples include "compete in an event", "enter a competition", "take part in a contest", or "participate in a tournament".