重点讲解：
1. what about (用于引出与之前内容相关的新的话题或观点)那么…怎么样；
例句：What about the question of security?
安全的问题怎么办?
2. compared to 与…相比；和…比起来；
例句：The New Year celebrations were subdued compared to years past.
今年的新年庆典与往年相比较逊色kNgFF@Bt31sfJ#OgO。
3. be composed of （由…）构成的；（由…）制成的；
例句：The exhibition is composed of three parts.
展览会由三个部分组成cPrh^*9fb;fW60RE。
4. be made of 组成；构成；
例句：These appliances are made of stainless iron.
这些器具是用不锈钢制成的]C.|8j-P1zcG#L。