重点讲解：
1. be littered with 充满的；
例句：The living-room floor was littered with filth and tin cans.
客厅地上丢满了脏东西和罐头听1z12d,~MhItpU|xr|。
2. rather than 而非；胜于；而不是；
例句：The zoo needed better management rather than more money.
这座动物园需要更好的管理，而不是更多的资金&]*d4Gl.GCA^eBlfC。
3. deprive of 剥夺；使丧失；使不能享有；
例句：Our children also depend on Earth's natural resources and we should not deprive them of such necessities.
我们的孩子同样需要自然资源，我们不能剥夺他们的这份必需品dj2v!vUCs9#o!Q。
4. be vulnerable to 易受伤害的；易受影响的；
例句：Children's developing brains and tissues are thought to be most vulnerable to cellphone radiation.
孩子发育中的大脑和组织被认为是最容易受手机辐射影响的O%jb6iRITCWb。