日期：
来源：雅诚德英语网
A team of researchers led by Sean McCrea of the University of Konstanz, in Germany, reckon they have found a piece of the puzzle.
德国康斯坦茨大学肖恩·麦克雷博士率领的研究小组认为：他们找到了一丝线索。
A team of researchers led by Sean McCrea of the University of Konstanz, in Germany, reckon they have found a piece of the puzzle.
德国康斯坦茨大学肖恩·麦克雷博士率领的研究小组认为：他们找到了一丝线索。