Ur innovative products and services for learners, authors and customers are based on world-class research and are relevant, exciting and inspiring. 那么，雅思考试究竟为何难考？所谓的雅思买分可不可行呢？本文将为大家逐一分析！ 一个物体、设备、过程或事件的图表。考生的作文中必须包含