“lethal concentration 50”的概念、定义、翻译、参考文献-科学参考

单词	lethal concentration 50
释义	lethal concentration 50 Encyclopedia 理学半数致死浓度释 lethal concentration 50 ；LC50半数致死浓度能使一群动物在接触外源化学物一定时间后并在一定观察期限内死亡50%所需的浓度。衡量存在于水中的毒物对水生动物和存在于空气中的毒物对哺乳动物乃至人类的毒性大小的重要参数。一般以毫克/米3表示空气中的外源化学物浓度，以毫克/升表示水中的外源化学物浓度。
随便看	government agencies library governmental authority governmental bonds Governmental electronic commerce procurement/ electronic commerce for public sector purchasing governmental image governmentality governmental management of environment governmental responsibility on environment and resources government application support technology government appointment as an incentive for donation government archives of Nanbu County, Sichuan Province in the Qing Dynasty Government Archives of the Ming Court government auditing government-based sport system government budget revision government-business relation government by law government cash budget government cash management government censorship government centralized procurement agency government cloud government communication government competitive intelligence government consumption expenditure

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。