exposure的形容词形式
exposedadj.无遮蔽的；不遮挡风雨的；易受攻击(或批评)的；无保护的；
exposuren.面临，遭受(危险或不快)；揭露
These units exposed children to many viewpoints of a given issue.
They had not been exposed to most diseases common to urban populations
城市人口中多数常见的疾病他们都没有接触到。
For an instant his whole back was exposed.
一瞬间，他整个背部都露了出来。