Conkling charged that President Garfield had failed to observe the policy of "Senatorial Courtesy."

VOA: special.2010.04.22

Stop when we ask you to stop out of courtesy to your classmates.

当我要求你停止你向你同学献殷勤时,你必须停止。

麻省理工公开课 - 固态化学导论课程节选