free field

例句：

1. 1. The team needs to work together in a free field to improve their performance.
   团队需要在自由场地中合作以提高表现。
2. 2. The farmer has cleared the free field for planting crops.
   农民已经清理了自由场地以便种植作物。
3. 3. During the summer, the children played freely in the open field.
   夏天时，孩子们在开阔的场地上自由玩耍。