pledge one's word (plèdʒ wʌns wɜːd)

Idiom Promise

含义

to make a serious or formal promise

做出严肃或正式的承诺 (zuò chū yánsù huò zhèngshì de chéngnuò)

例句

"He pledged his word to support the cause."

"他承诺支持这个事业。" (Tā chéngnuò zhīchí zhège shìyè.)