重点讲解：
1. be covered in
盖满，覆满，充满；
eg. Her face was covered in wasp stings.
她脸上满是黄蜂蜇过的伤痕。
eg. This sofa is covered in real leather.
这沙发是真皮的。
2. be full of
有大量…的；满是…的；
eg. His songs are full of dirge.
他的歌充满了忧伤。
eg. Jem was full of beans after a long sleep.
杰姆好好睡了一觉之后又变得精力充沛了。
3. more than
超过；超出；
eg. For safety's sake, don't drive more than 30 kilometers per hour in the city.
为了安全起见，在市内开车时速不要超过三十公里。
eg. This city has a population of more than 1,000,000.
这个城市人口超过一百万。