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= masing.
1970s; earliest use found in Astronomical Journal. From maser + -ing1970s; earliest use found in Physics Bulletin. From maser + -ing.
1970s; earliest use found in Astronomical Journal. From maser + -ing<br>1970s; earliest use found in Physics Bulletin. From maser + -ing.
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。