n.预防；预防措施
You should take an umbrella just as a precaution. 你该带把伞，有备无患。
I took the precaution of locking everything in the safe. 我把一切东西都锁在保险箱里以防万一。
All this wake the local government to the need for safety precaution. 所有这些使当地政府认识到必须采取安全预防措施。
adj.预先警戒的；预防的；留心的
