The playing area was marked off with a white line.

运动场地用白线划了出来。

《牛津词典》

The playing area is demarcated by a white line.

运动场地以白线为界。

youdao

White lines divide the playing area into sections.

这些白线把赛区分成各个部分。

youdao

The playing area had six robots, three on each team.

VOA: special.2009.04.24

Daw hopes his efforts will encourage other African migrants to integrate more into Australian society "When I first started a lot of my Sudanese friends,the boys, they weren't a fan of me playing footy,they tend to hang around the Sudanese people,just one area,"

VOA: standard.2009.12.17

At cricket matches, beach balls that transgress onto the playing area are confiscated and punctured.

BBC: Australia: What the rest of the world gets wrong

He was later charged with going on to the playing area, contrary to the Football Offences Act.

BBC: Comedian Lee Nelson

The wide-open playing area is a pebble's throw from the audience.

WSJ: A Little Night Music | Writers' Theatre | A 'Night' to Remember | Theater Review by Terry Teachout