v.加入(额外的事)；窜改；插话
If I may interpolate a comment, before you continue your speech ... 很抱歉打断你的演讲，请让我插句话 ...
Close inspection showed that many lines had been interpolated into the manuscript at a later date. 经仔细检查发现不少字句是后来添写进原手稿中去的。
