化学
电离
This machine shatters tiny amounts of a sample into its component atoms, ionises those atoms in order to give them an electric charge, and then uses that charge to attract the atoms along a tube.
ECONOMIST: Monitor
英汉双解词典包含3185865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。