他一口咬定当时不在现场。

He stated categorically that he was not at the scene of the crime.

《新英汉大辞典》

外商不买，过了数日，再托人向胡申买，胡坚持咬定此价。

Foreign investors do not want to buy, after a few days, the foreigner ask someone to purchase from Hu, but he insisted that this price.

youdao

但是瑞安先生却咬定美元在贬值，拒不接受否定的答复。

But Mr. Ryan is sure that the dollar is being debased and won't take no for an answer.

youdao