Obedience is the first duty of a soldier军人以服从命令为天职。
Observation is the best teacher.观察是最好的老师。
Offense is the best defense.进攻是最好的防御。
Old friends and old wines are best.陈酒味醇,老友情深。
Old sin makes new shame.一失足成千古恨。
Once a man and twice a child.一次老,两次小。
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