He stepped foot on the surface right after Neil Armstrong.

VOA: special.2010.04.28

They had these characters that would operate according to water flow and so if you stepped on a certain panel, a swordsman would jump out with a sword.

园林中有很多人偶造型,可以运用水流来控制他们的动作,当你踏上相应的踩踏板,一个剑客便会跳出来向你挥剑

耶鲁公开课 - 心理学导论课程节选

Abdel Basset al-Megrahi received a warm welcome from flag waving Libyan supporters as he stepped off the plane Thursday in Tripoli, after his release from custody in Scotland on compassionate grounds.

VOA: standard.2009.08.21