“pencil cave”的概念、定义、翻译、参考文献-科学参考

单词	pencil cave
释义	pencil cave [`pen·sǝl ´kāv] ^ENGINEERING A driller's term for hard, closely jointed shale that caves into a well in pencil-shaped fragments.
随便看	Phoenicopteriformes Phoeniculidae Phoenix Pholadidae Pholidophoridae Pholidophoriformes Pholidota Phomaceae Phomales phon phonation phone phonemic synthesizer phone patch phone plug phonetic alphabet phonetic search phonic motor phonocardiograph phonoelectrocardioscope phonograph phonograph cartridge phonograph cutter phonograph needle value control

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。