standard fruit-tree

例句：

1. 1.The standard fruit-trees in the park are a delight to see.
   公园里的标准果树令人赏心悦目。
2. 2.The farmer carefully selected the best fruit-trees for his orchard.
   这位农民精心挑选了最适合他的果园的果树。
3. 3. The standard fruit-trees were planted in the city's parks as a symbol of progress.
   城市公园里种植的标准果树象征着进步。