She conjectured the existence of a completely new species.

她推测有一个全新物种存在。

He conjectured that the population might double in ten years.

他推测人口在十年后可能会增加一倍。

He conjectured that some individuals may be able to detect major calamities.

他推测有些人也许能察觉到重大灾难。

It was just as I conjectured.

那正如我所推测的。

The ants stuck outside might be old or sick Tofilski conjectured.

托非斯基推测，留在穴外的蚂蚁，可能不是老了，就是病了。