US astronaut Neil Armstrong made the historic first step on the Moon from Apollo 11's landing craft called the Eagle.

VOA: standard.2009.07.16

No longer able to step back from the first order pleasure.

无法从初级快乐中抽身而出。

耶鲁公开课 - 死亡课程节选

"When we look at counterinsurgency the first and critical step is to separate the enemy from the people,"

VOA: standard.2009.12.08