踏足

tà zú shè huì

踏足社会

enter society

tà zú qí jiān

踏足其间

set foot in the midst of something

nà shì wǒ dì yī cì tà zú měi zhōu dà dì

那是我第一次踏足美洲大地。

It was the first time that I had set foot on American soil.