| 释义 |
DEFINITIVE EXAMPLES 权威例句〔coal measures〕Coal Measures A stratigraphic unit equivalent to the Pennsylvanian or Upper Carboniferous periods. Coal Measures 煤系：地层单位，相当于美国宾夕法尼亚纪或上石炭纪时期的地层单位美国传统〔coal measures〕Strata of the Carboniferous period containing coal deposits.地层：石炭纪时期有煤层的地层美国传统〔lay down〕The steep-sided valley is of carboniferous limestone laid down as mud some 330 million years ago.山谷陡峭的一侧是石炭纪石灰岩, 在大约3.3亿年前由淤泥沉积而成。外研社新世纪〔lower〕Lower Carboniferous 石炭纪早期英汉大词典 |