pensive/ˈpensɪv; `pɛnsɪv/ adjthinking deeply about sth, esp in a sad or serious way 沉思的; （尤指）忧虑的 a pensive expression, look, mood 忧虑的表情、 样子、 情绪 She looked pensive when she heard the news. 她听到这消息时神情严肃.
牛津英汉双解词典