“plowpan”的概念、定义、翻译、参考文献-科学参考

单词	plowpan
释义	plowpan Encyclopedia 农学土壤层次释 plowpan犁底层位于耕作层（Ap1）以下较为紧实的土层。耕作表层（Ap）的一个亚层次。用符号Ap2表示。
随便看	safety operation of crane safety operation regulation safety paper safety pedagogy safety performance safety performance evaluation safety period of fertility alteration safety pharmacology safety physiology safety pillar safety pre-evaluation safety production cost safety production incentive mechanism safety production index safety production insurance safety production liability insurance safety production license system safety production of hydropower station safety production qualification certification training safety production responsibility system safety production rules and regulations safety production strategy safety product validation safety profit safety protection

科学参考收录了854744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。