surround,surrounding,surroundings 用法区别是什么?

surrounding Trees surround the pond.树木围绕著池塘 动词过去式 现在分词:surrounding A large fortified building or group of buildings with thick walls,usually dominating the surrounding country.城堡带有厚墙的用来设防的大型建筑物或建筑群,通常控制周围的村庄 surroundings名词 I was rebuffed and I spent a grim and tragic Christmas Eve in those most unchristian surroundings 我受到驳斥,在这种最没有基督教精神的环境中,我度过了一个十分惨淡的圣诞节前夜