“pay sand”的概念、定义、翻译、参考文献-科学参考

单词	pay sand
释义	pay sand [`pā ´sand] ^{PETROLEUM ENGINEERING} That portion of an oil or gas sand in which the oil or gas is found in commercial quantity.
随便看	bell belladonna Bellamy drift bell-and-spigot joint bell arch Bellatrix bell buoy bell cap bell character belled caisson Bellerophontacea bell glass bell hole bellingerite bellite bell jar bell-jar testing bell-joint clamp Bellman's principle of optimality bell metal bell-metal ore bell mouth bell nipple bellows bellows expansion joint

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。