smell blood idiom
发现有机可乘；意识到可以乘人之危
to recognize an opportunity to take advantage of someone who is in a difficult situation
When she smells blood, you don't get a second chance. 当她意识到机会来了时，你就没有第二次机会了。
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。