keep back是什麼意思

Roughly chop the vegetables, and keep back a little to chop finely and serve as a garnish.

大致切一下蔬菜，留下一點切細用作飾菜。

I keep thinking back to the day I arrived here.

我不斷回想起剛到這兒那一天的情景。

Keep well back from the road.

離公路遠些。

Police had to erect barriers to keep crowds back.

警察只得設立路障來阻截人羣。

Police had to erect barriers to keep crowds back.

警察得設立路障來阻截人羣。

Why do they keep passing back to the goalie?

他們為什麼總是把球回傳給守門員？