A sheet of material with a thickness of 1 to 100 nanometres, of which graphene is a typical example.
A sheet of material with a thickness of 1 to 100 nanometers, of which graphene is a typical example.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。