He listened to her with perfect indifference while she chose to entertain herself in this manner, and as his composure convinced her that all was safe, her wit flowed long.
1.indifference [ɪn'dɪfrəns] 不在乎、不感兴趣
2.entertain[entə'teɪn] 娱乐
3.composure[kəm'pəʊʒə] 镇定、沉着
4.wit才智、巧言善辩