Sorry, I couldn't help overhearing, did you mention something about...
对不起,我无意中听到你们的谈话,你们是不是提到...
who produced it with a flourish and pointed out a microscopic 'o' beside the time of the arrival of the train at his station;
站长拿着时刻表一挥手,指着那趟列车到站时刻旁边一个很小的圆圈标记。