Earth scientists announced at a news conference recently that th

Earth scientists announced at a news conference recently that they had used the system for closely monitoring a deep-sea volcanic eruption for the first time and that they plan similar studies.
【正确答案】：在最近举行的一次新闻发布会上地球科学家们宣布，他们首次利用该系统对一次深海火山爆发做出了近距离检测，他们还计划再搞一些类似的研究。