the operative word idiom
关键词;最重要的词
the most important word in a phrase, which explains the truth of a situation
He was a painter - "was" being the operative word, since he died last week. 他曾经是位画家——“曾经”是关键词，因为他上周去世了。
江苏热线英汉汉英双解词典包含207361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。