网站首页 汉语 德语 英语
A cycle of operations in which a working fluid, coolant, etc., is used only once.
1950s; earliest use found in Nucleonics.
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。