英语语法分析

The second occurred among the ancestors of East Asians and Europeans, after the ancestors of Melanesians split off.

第二次产生于东亚人和欧洲人的祖先当中，在美拉尼西亚人的祖先分离后。

One mystery is why the Denisovan genes are unique in modern Melanesians and are not found in other Eurasian groups that have so far been sampled.

一个奇怪的现象是为何Denisovan基因仅存于现代的美拉尼西亚人中，而在其他被广泛采样的亚欧人群里却未被发现。

Our idea is that the ancestors of Melanesians met the Denisovans in Southeast Asia and interbred, and the ancestors of Melanesians then moved on to Papua New Guinea.

我们的观点是，美拉尼亚人的祖先在亚洲东南部与丹尼·索万人相遇并通婚，然后美拉尼亚人的祖先来到巴布亚新几内亚。