weigh in
phrasal verb with weigh verb uk/weɪ/ us/weɪ/
(SPORT)
（尤指拳击或赛马比赛之前）称体重
to be officially weighed before competing in a sport, especially boxing or horse racing
Tyson weighed in at 245 lb for the fight. 泰森打这场比赛时体重为245磅。
(DISCUSSION)
informal积极参与（辩论或讨论）
to become involved in an argument or discussion in a forceful way
Several leading architects weighed in with criticisms regarding the design of the new museum. 几位著名的建筑师加入讨论，对新博物馆的设计方案提出了批评意见。