英语语法分析

Many small private collieries in the area have been shut down.

当地的许多私人小煤窑都被关闭了。

Today the coal industry in Britain is on the decline, the number of miners, collieries and the totaloutput have been falling.

如今的英国煤矿业衰退，从而导致矿工、煤矿的数量和总产量都大大下降。

This paper describes the corrosion surroundings of Chinese underground collieries and the present protection state of coal mining equipment.

阐述了我国煤矿井下的腐蚀环境和采煤设备的防护现状。