chestnut for culinary use

例句：

1. 1. The chestnut soup is a popular winter dish in many parts of China.
   中国的许多地区冬季流行的一道汤是栗子汤。
2. 2. The chestnut tree produces a nut that's rich in protein and fiber.
   栗子树结出的坚果富含蛋白质和纤维。
3. 3. The chestnuts are ready to harvest now, so we should go pick some soon.
   现在正是收获栗子的时候，我们应该去摘一些。