The diagrams below the stages and equipment used in the cement-making process, and how cement is used to produce concrete for building purposes.
Summarise the information by selection and reporting the main features, and make comparisons where relevant.
关于雅思流程图的写作考试其实不仅仅是写作考试，我们一再强调是英语常识的考试。左边这个例子有很多设备的功能是隐藏起来的，例如crusher------>powder; mixer; rotating heater; grinder。因为只有清楚了功能才能更有效的选择句子的主要信息和次要信息。
The raw materials of limestone and clay are firstly crushed into powder that is further evenly combined in a tube-shaped mixer.
在上面这句例句里，the raw materials需要考生自己能够想到，limestone and clay是两种基础的原材料。crusher的作用就是初步粉碎。而mix的作用是将powder充分的混合。合理使用relative clause会让这类描述更加有连贯性，会比仅仅使用连接词更加自然。使用副词在写作中同样让文章学术化描述更加突出。