Doctoral Candidate短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 博士研究生 In the spring of2009, Rachel Grant, a doctoral candidate in life sciences at London's Open University, was studying a population of toads in a large dry lake in central Italy. 2009年春，伦敦开放大学的博士生 Rachel Grant，在意大利中部一个枯水大湖进行蟾蜍的种群数量的研究。 yeeyan