是可数名词，例如：
1、This would be a good place for a picnic.这可是个野餐的好地方。
2、It was a perfect day for a picnic.那是野餐最理想的天气。
3、Bringing up a family when you're unemployed is no picnic.失了业还要养家可不是容易的事。
4、This would be a good place for a picnic.这可是个野餐的好地方。
picnic是可数名词。picnic N-COUNT 野餐户外用餐 When people have a picnic， they eat a meal out of doors， usually in a field or a forest， or at the beach.
