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1·I planted those apple trees.

我种了那些苹果树。《柯林斯英汉双解大词典》

2·When should you prune apple trees?

苹果树应该什么时候剪枝？《牛津词典》

3·He was up a ladder sawing off the tops of his apple trees.

他在梯子上锯苹果树的树冠。《柯林斯英汉双解大词典》

4·We had lots of pear trees and some apple trees.

我们有很多梨树和一些苹果树。

5·Were these apple trees planted by the students in Class 1?

这些苹果树是一班的学生种的吗？

6·There are apple trees and pear trees.

苹果树和梨树。

7·The trees being planted are apple trees.

正在种的树是苹果树。

8·They are orange trees, apple trees and peach trees.

它们是橘子树、苹果树、桃树。

9·There were apple trees, orange trees and pear trees.

有苹果树、桔子树和梨树。

10·There are a few apple trees scattered among these peach trees.

这片桃树中杂有几棵苹果树。《新英汉大辞典》