这些基因学家的研究工作令人“印象十分深刻”。他说，他们为瘟疫历史研究增添了第三条途径。之前只有历史学家和考古学家参与其中。
The geneticists' work is “immensely impressive,” Dr. Little said, and adds a third leg to the studies of plague by historians and by archaeologists.
为了寻找一条有效而经济的矫正果树缺铁失绿症的途径，研究者进行了大量的研究工作，但到目前为止仍没有一个得到广泛认可的有效方法。
In order to search an effective and economic approach, researchers have done much research job, but by now, they haven't found a recognized and effective way to deal with this problem .
功能磁共振作为一种新型无损伤技术，为研究工作记忆提供了一个新的途径。
Functional magnetic resonance imaging, being a new noninvasive technique, provides a new approach to working memory research.
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