Do not add any commentary. Do not fall into this trap. Another old tactic is for a lawyer to ask you if you have discussed your testimony with your lawyer. This is asked in a manner calculated to imply that you have been coached or have been told what to say. If you do not understand a question, ask for the question to be repeated.
Lawyers often ask confusing questions.
Sometimes, the questions are not even intended to be confusing. When in court, speak to the judge. If you think you are speaking too fast, stop, pause for a second or two, slow down, then finish your answer. You are not in a conversation. The regular rules of human interaction do not apply.