高危人群
高危儿
危险高发区
Keep in mind that an angel makes an investment in a highrisk opportunity (such as your fledging company) only when a return is expected.
WSJ: What's an Angel Investor?
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。