Many of them are low coral or limestone hideaways of palm trees, trade winds, and sand.許多島嶼是低矮的珊瑚,或隱匿著棕櫚樹(shù), 信風(fēng), 和白沙的石灰石....a rich and deep vein of limestone.儲(chǔ)量豐富的深層石灰石礦脈The channel is overlain by siltstone and lenticular ...
Limestone is often used in building construction.石灰?guī)r常用于建筑.Cement is made from limestone.水泥是由石灰石制成的.The limestone is sufficiently fissured for tree roots to have breached the roof of the cave.石灰?guī)r上有許多縫隙，故而樹(shù)根能從巖洞頂部長(zhǎng)出來(lái)。...