您要查找的是不是：
- This layer of rock contains a lot of flint. 这一岩层中有大量燧石。
- Your cigarette-lighter needs a new flint. 你的打火机需换新电石了。
- Any of several tough, porous leather substitutes. 通气性强的塑料几种粗糙的多孔的皮革代用品
- He added sand to the soil to make it more porous. 他往土里掺了些沙子以提高渗水性能。
- porous flint 多孔质火石
- At that time they have learn to strike fire from flint. 那时他们已学会了用燧石打火。
- A piece of flint used as a tool by primitive human beings. 打火石原始人作为工具用的一块打火石
- At that time they had learned to strike fire from flint. 那时他们已学会了用燧石打火。
- In hot weather clothes made of a porous material like cotton are best. 热天穿棉布之类有渗透性的材料做的衣服最为适宜。
- He is as hard as flint where business in concerned. 在买卖上面他是冷酷无情的。
- One can strike out sparks from flint with steel. 用钢铁敲打火石，可以打出火花来。
- In hot weather cloths made of a porous material like cotton are best. 热天穿棉布之类有渗透性的材料制成的衣服最为适宜。
- He is as hard as flint where business is concerned. 他在生意上是冷酷无情的。
- An early flint tool with a head like a chisel. 錾刀一种尖端象凿子的古代燧石工具
- She gave him a look as hard as flint. 她冷酷地瞪他一眼。
- To lap better, all porous holes. 上面净是气孔，便于舔食。
- It is possible to strike fire from flint. 火石可以打火。
- He add sand to the soil to make it more porous. 他往土里搀沙子以提高渗水性能。
- They tipped their arrows with flint. 他们将箭的尖端装上燧石。
- The randomness is attributed to the porous medium. 随机性起因于多孔介质。
