dogged
- adj. 顽强的；顽固的
- vt. 跟踪；尾随（dog的过去式）
考试真题
- After being dogged by technical delays for years, sir Richard Branson, virgin Galactic's founder, had recently suggested that a Spaceship Two craft would carry its first paying customers as soon as February 2015.
2015年12月六级真题（第二套）阅读 Section C