单词	exact differential
释义	exact differential noun : a differential expression of the form X1dx1 + … + Xndxn where the X's are the partial derivatives of a function f(x1,  …  , xn) with respect to x1,  …  , xn respectively Word History First Known Use 1825, in the meaning defined above
随便看	acter acters actg ACTH acths Acti-dione actia Actias actiases actifedes actifeds actification actifier actify actin actinal actinally Actinaria actinariae actinarias actinautographic actinautography actine acting acting (toward)

英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。