There are four principal types of limestones.

灰有四种主要类型。

Limestone has a strange property that it dissolves in rain water.

灰有一个奇怪特性，能溶解于雨水。

These were large donut-shaped disks made out of limestone.

这些巨大环状圆盘是由灰制成。

Round about, piles of limestone glistened in all the colours of the rainbow.

周围是一堆堆灰，像彩虹一样闪闪发光。

And besides these groups, and the less affluent ones, the deposits of iron ore and lead, the limestone and flint, and the brown and yellow clays also sustained the numerous industries in the area.

除了这些群体不太富裕群体之外，铁矿铅、灰火矿藏，棕色黄色粘土也支撑着该地区众多工业。

It is made by combining limestone, a type of rock, and vinegar.

它是由灰(一种岩)醋混合制成。

Making cement involves burning limestone at 1500 degrees Celsius.

制造水泥需要在一千五百摄氏度温度下燃烧灰。

White came from clays, limestone, or gypsum.

白色来自粘土、灰或膏。

Magnificent structures typically made of limestone and scattered all across Greece and its islands.

那些结构典型地用灰做而分散在整个希腊它一下岛屿上。

Instead, the scientists found that the chunks could fuel the material's " self-healing" abilities.

相反，科学家发现，这些灰块可以增强材料“自我修复”能力。

Lime is a powdery substance that comes from heating limestone.

灰是加热灰产生粉末状物质。

Round about, piles of limestone glistened in all the colours of rainbow.

与洞顶悬挂下来钟乳相接。周围是一堆堆灰，像彩虹一样闪闪发光。

Dee broke off a piece of limestone and thumbed it into the stream.

迪弄碎一块灰，然后用拇指将它弹入水中。

He's a bust, carved of limestone using a stone chisel and a basalt hammer, and the features are large, symmetrical, the eyes closed, the lips parted-as though this god is in communion with a different world, quietly meditating.

他是一件胸像，使用凿玄武岩锤在一块灰上雕刻出来。五官宏大，左右对称，双眼紧闭，嘴唇分开，仿佛这位神灵正在与另一个世界进行沟通，沉浸在冥想中。

He claims that this library, which went up, “before the monumental limestone and marble” of the Washington Mall “was one of the first really beautiful public buildings.”

他说，在华盛顿广场巨大灰大理之前建起来这座图书馆是“最早真正美丽公共建筑之一”。

More than 3,000 years ago Mesoamericans, living in what is Mexico and Central America today, cooked corn kernels in a solution of wood ash or limestone.

3000多年前，生活在今天墨西哥中美洲中美洲人将玉米粒放在木灰或灰溶液中烹制。

Experts emphasized one new cement mixture that gets the clinker ratio safely down to 50% by supplementing it with more clay and unprocessed limestone.

专家们强调了一种新水泥混合物，通过添加更多粘土未加工灰，可以将熟料比例安全地降低到 50%。

In 1987, a team from the National Geographic Society drilled a hole through one of the limestone blocks sealing the chamber from above, and inserted a video camera.

1987年，国家地理协会一组工作人员来在地下室封口一块灰上钻孔，安装了一个录像机。

She owns a nursery in the state of Rio de Janeiro where she mixes soil, limestone and clay to grow saplings from seeds of local trees.

她在里约热内卢州拥有一家苗圃，在那里她将土壤、灰粘土混合起来，用当地树木种子培育树苗。

Because lying beneath the seafloor, directly under the spot where the asteroid struck, were layers upon layers of anhydrite and limestone.

因为在海床底下，小行星撞击地点正下方，是一层一层硬膏灰。