例句：
The equation of wealth with happiness can be dangerous.
Going into the projects alone is dangerous.
只身进入公房区是危险的'。
It's known as the most dangerous part of the city.
人们都认为那是市内最危险的地段。
I need hardly tell you that the work is dangerous.
这工作很危险，这就不用我说了。
It would be dangerous for you to stay here.
你待在这儿不安全。
