serious problem
短语词组
- causing serious traffic problem 造成严重交通问题
- serious social problem 严重的社会问题
- A Serious Social Problem 上一篇
- a serious unemployment problem 严重的失业问题
- serious environmental problem 严重的环境问题
- serious environment problem 严重的环境问题
- the most serious social problem 最严重的社会问题
- such a serious problem 如此严重的问题;一个如此严重的问题
- extremely serious problem 极其严重的问题 返回 serious problem