Limestone is often used in building construction.石灰岩常用于建筑.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.石灰岩上有许多缝隙，故而树根能从岩洞顶部长出来。...
The sincere tasty tannic acid symbolized this liquor completely brews maturely.淳厚爽口的丹宁酸标志着此酒完全酿造成熟.She acts very maturely for her age.就她的年龄而言,她的举止是很成熟的.With the development of ADC technology and IC technology , digital r...