他山之石可以攻玉的英文：
1.The stones of those hills may be used to polish gems.

stones是什么意思：
n. 岩石，石头，石料；石块，宝石，钻石；果核；英石（英国重量单位）
v. 向（某人）扔石块，用石头砸；去掉果核

Level the city stone by stone to an extinct waste.
一块石头一块石头地夷平该市，使它成为一片没有人烟的荒原。

And then he continued to dig for his son, stone by stone.
然后继续挖掘，掀开了一块一块的石头寻找他的儿子。

The lane to the garden was overlaid with stones.
通往花园的小径上铺了一层石子。

those是什么意思：
pron. 那些
adj. 那些

Are those shoes sensible for walking?
那双鞋便于走路吗?

Those prisoners are dreaming of liberty.
这些囚犯们梦想着获得释放。

Those are potatoes cooked in their jackets.
那是带皮住的土豆。

hills是什么意思：
n. 山冈；小山；斜坡

Their houses stand on a hill.
他们的房屋坐落在小山上。

The city sits on a hill.
此城坐落在一座小山上。

range the hills, countryside, etc
漫游山地、 乡村等.