In the textbook, we learned that 一片 is the measure word for thin, flat objects such as leaves. But it seems to mean differently in 一片草地.
What does the measure word 一片 mean? and how to use it?
About 一片, there are some explanations:
Hope that can help.
“一片” can be used in many ways. Generally speaking, we tend to use that in:
1) A wide plain of groud（一片草原，一片草地……）
2) A very thin,small or tiny thing: （一片胡萝卜，一片山楂）
3) few, little（片刻，片甲不留）
For more, you can refer this：http://www.zdic.net/z/1e/js/7247.htm