The holes are only borings, less than a foot in diameter.油井仅仅是一些钻孔, 其直径不到一英尺.These borings consist of rock fragments, ash coal and other materials.这些孔屑包括石头碎片 、 灰尘、煤渣和其他东西.Based on thermodynamics principle, the feasibilit...

金属切屑...

borings的音标：borings的英式发音音标为：['bɔ:rɪŋz]borings的美式发音音标为：['bɔrɪŋz]...