1877Huxley Anat. Inv. Anim. vii. 404 A distinct median sclerite, the sternum, may be observed; and a much larger tergal piece, the notum.
英语词典包含277258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。