The defense lawyers tried to impeach the witness's testimony by forcing him to admit that he had changed his story.辩护律师力图通过迫使证人承认自己改变了对事情的描述，来使人怀疑其证言的真实性。Prosecution and defense lawyers are expected to deliver closing arguments next week.下周控辩双方律师将进行结案陈词。The defense lawyers tried to bait him and get him to act aggressively.辩护律师企图让他恼火，使他做出侵犯性的行为。