“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	element 109 elemental area elemental motion elementary charge elementary commodity group elementary excitation elementary function elementary group elementary item elementary particle elementary process elementary reaction elementary ring structure elementary symmetric functions element breakdown elements element time elemi eleolite eleostearic acid elephant elephanta elephant ear elephanter elephant-hide pahoehoe

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。