1.
They are exploiting the oil under the sea.
他们在开发海底石油。
2.
CHATON ROSES are essentially chatons with flat backs, and so can either be used in fashion jewellery or pressed on fabrics and dresses as HOT-FIX STONES.
平底水钻(平底石)可用于时尚首饰，或作为烫石压于布料及服装上。
3.
Father put some dry wood on the hearthstone.
父亲将一些乾材放到壁炉底石上。
4.
cover(stone or brick)with a first layer of plaster
在（石或砖）上抹灰泥打底
5.
The stone cut the sole of her foot.
石头割伤了她的脚底。
6.
rathole gravel slurry
井底口袋内的砾石砂浆
7.
The sand and stones gravitated to the bottom of the river
沙和石头沉到了河底。
8.
undercut a vein of ore.
底切一块有纹理的矿石。
9.
Scraped the bottom of the car on a rock.
岩石擦坏了汽车底盘
10.
The stone fell 10 metres before reaching the bottom of the well.
石头落下十米才到井底。
11.
a diamond in a gold setting
镶在金质底板上的钻石
12.
Gathering firewood down in the valley Or Boiling white stones for potatoes in his hut....
涧底束荆薪, 归来煮白石。
13.
first layer of plaster(on stone or brick)
（石或砖上）打底的灰泥, 底灰.
14.
The dropping water and the solid stone--how utterly it yields at last!
水滴石穿，石头终究要彻底地认输！
15.
it was built on a base of solid rock; he stood at the foot of the tower.
它的底部是一块坚硬的岩石；他站在塔的底部。
16.
The bottom of a reverberatory furnace, where ore is exposed to the flame.
炉底矿石在此暴露在火焰中的反射炉的底部
17.
Explanation: What lies at the bottom of Hyperion's strange craters?
( 说明：土卫七奇异的陨石坑底，到底藏了些什麽？
18.
What caused this unusual looking crater floor on Mars?
火星这个奇特的陨石坑底到底是怎麽形成的？