1.
A soft, porous limestone, composed essentially of fragments of shells and coral, used as a building material.
贝壳灰岩一种质软、多孔的灰岩，基本上由贝壳及珊瑚的碎片构成，用作建筑材料
2.
Petworth marble
彩色的含有贝壳形迹的石灰石
3.
Deposition of Plate-Like Apatite on Nacre Surfaces and Its in Vitro Bioactivity
贝壳表面沉积片状磷灰石及其体外生物活性
4.
Preparation of Hydroxyapatite(HAp)-Shell Sand De? uorinating Agent by Process of Metasomatic Crystallization
交代结晶法制备羟基磷灰石/贝壳砂除氟剂
5.
Betty sells shells on the back of a red shell.
贝蒂在红色贝壳的背面上卖贝壳。
6.
White shell beads used as wampum.
白色贝壳串珠用作贝壳串珠的白色贝壳小珠
7.
shellfish with a hinged double shell,eg a mussel or clam
双壳贝类（如贻贝或蛤）
8.
How Does the Sound of the Ocean Get Inside a Seashell?
到贝壳里“听海”？
9.
The shells she sells are seashells, I'm sure.
我确定她卖的贝壳是海贝壳。
10.
Having or forming a shell.
有贝壳的有或形成贝壳的
11.
Wampum was made of seashells.
贝壳串珠是用海贝壳制作的。
12.
A crumbly mixture of clays, calcium and magnesium carbonates, and remnants of shells, used as fertilizer for lime - deficient soils.
泥灰土一种由粘土、钙、镁碇酸盐和贝壳碎片构成的易碎混合物，用作缺乏碳酸钙土壤的肥料
13.
Shells can be found everywhere on the beach.
海滩上的贝壳俯拾皆是。
14.
and the roof was made of shells.
屋顶则是贝壳打造的。
15.
For if she sells seashells on the seashore,
因为她在海边卖贝壳，
16.
cook(eg oysters)in a scallop-shell
在扇贝壳里烤制（如牡蛎）.
17.
The lobster is a shellfish.
龙虾是水生贝壳动物。
18.
Look at this beautiful shell.
看看这个漂亮的贝壳。