unsafe

形容词 unsafe:

1. lacking in security or safety
   同义词：insecure
2. involving or causing danger or risk; liable to hurt or harm
   同义词：dangerous
3. not safe from attack
   同义词：insecure

1. The effluent from the factory makes the river unsafe for swimming.
   工厂放出的废水把这条河弄得不能游泳了。
2. The auto- maker recalls a lot of cars that are unsafe.
   汽车制造商召回许多不安全的车辆。
3. It's unsafe for her to go alone.
   她单独去是很危险的。
4. She lives in an unsafe city.
   她住在一个不安全的城市中。