重点讲解：
1. be made of/be made out of （由…）构成的；（由…）制成的；
例句：The hut was made of poles covered with grass mats.
茅屋用木杆搭成，上面以草席覆盖syqTHO*&ZdR~[a,+t。
例句：Traditionally gates were made out of wood, normally oak for its durability.
按照传统，门往往由木头制成，为了耐用，往往选用橡木)7+kKEiO+xL8v@~。
2. be similar to 相像的；相仿的；类似的；
例句：The hardness of ice is similar to that of concrete.
冰的硬度和混凝土相仿P+teR_ArnH6u6LEmm6。
3. be composed of 组成；构成；
例句：This university is composed of five colleges and one graduate school.
这所大学由五个学院和一个研究生院组成K6I~.%(E#9HTb]a。
4. and so on 及诸如此类；等等；
例句：These cars vary in size, price, colour and so on.
这些汽车在大小、价格、颜色等方面各不相同ea_Bqm_Kpf+huQKjy8O。