spoor

例句：

1. 1. The swamp was full of mosquitoes and insects.
   沼泽里满是蚊子和昆虫。
2. 2. The mire made it difficult for the horses to move.
   泥沼让马难以移动。
3. 3.The marsh is a habitat for many rare plants and animals.
   沼泽是许多稀有植物和动物的栖息地。