throw your hat into the ring
US /θroʊ jʊər hæt ˈɪntu ðə rɪŋ/
UK /θroʊ jʊər hæt ˈɪntu ðə rɪŋ/

1.
參選, 加入競爭
to announce one's candidacy for an election or competition
:
•
After much deliberation, she decided to throw her hat into the ring for mayor.
經過深思熟慮,她決定參選市長。
•
Several candidates are expected to throw their hats into the ring for the upcoming presidential election.
預計將有多位候選人參選即將到來的總統選舉。