They fetched clamshells on the beach.
他们到海滩上去捡贝壳。
Excavation may be done by any of several excavators, such as shovels, draglines, clamshells, cranes, and scrapers.
土方发掘可用任何发掘机举行，如单斗发掘机、拉铲发掘机、蛤壳式挖泥机、起重机和铲运机等。
By analyzing clamshells unearthed on Canada's Melville Island, he can pinpoint individual summers in the region dating back 370 million years.
通过分析在加拿大梅尔维尔岛出土的蛤壳，他可以准确说出三亿七千万年来该地区某些夏季的天气情况。
A study this March of clamshells taken from Iceland found that the levels of oxygen isotopes in the shell layers varied depending on the temperature of the water in which they formed.
今年3月，通过对冰岛一带贝壳的研究发现，其硬壳氧同位素的水平会随水温的变化而产生差异。
He has analyzed clamshells to gain perspective on the Vikings, who migrated from Europe's mainland to Iceland, Greenland, and northeastern stretches of north America hundreds of years before Columbus.
他分析了蛤壳以了解有关维京人的过去，维京人在哥伦布之前数百年就从欧洲大陆迁徙到冰岛，格陵兰和北美东北部绵延的大陆。
He has analyzed clamshells to gain perspective on the Vikings, who migrated from Europe's mainland to Iceland, Greenland, and northeastern stretches of north America hundreds of years before Columbus.
他分析了蛤壳以了解有关维京人的过去，维京人在哥伦布之前数百年就从欧洲大陆迁徙到冰岛，格陵兰和北美东北部绵延的大陆。
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