例句：
Going into the projects alone is dangerous.
只身进入公房区是危险的。
It is dangerous to generalize about the poor.
对穷人一概而论是危险的。
It's not just stupid—it's downright dangerous.
这岂止是愚蠢—简直是危险。
We were in grave danger.
我们处于极大的危险之中。
Sensing danger, they started to run.
他们感到有危险，撒腿就跑。
The sign said 'Danger: falling rocks'.
警示牌上写着“危险：前有滚石”