1 PHRASAL VERB 接受,同意(提议或邀请) If you take someone up on their offer or invitation, you accept it. 接受,同意(提议或邀请)
2 PHRASAL VERB 追问;要求…解释 If you take a person up on something, you ask them to explain something that they have just said or done, for example because you think it is wrong or strange. 追问;要求…解释