例句與造句

1. It is indicated that the span and flexural stiffness of cavern roof , the dimension and brittleness of coal pillar , the uniformity of coal material and the size of mineral grain are the important factors influencing rock burst of coal pillar
   分析表明，頂板的跨徑、頂板的抗彎剛度、煤柱的尺寸、謀柱的脆性、煤巖材料的均勻性和礦物顆粒的大小是煤柱巖爆的重要影響因素。
2. It's difficult to find sizing of minerals in a sentence. 用sizing of minerals造句挺難的