This has led scientists to speculate on the existence of other galaxies.

这就使得科学家推测还有其他星系存在。

《牛津词典》

He likes to speculate on the stock market.

他喜欢炒股。

《牛津词典》

He refused to speculate on the possible effects on relations between the two governments.

他拒绝猜测这对两国政府关系可能产生的影响。

youdao

Clinton,appearing at the State Department's daily press briefing, said she did not want to speculate on Iran's political future, but she that the reported recount is unlikely to do much to defuse election-related tensions.

VOA: standard.2009.06.29

"Therefore, we don't want to speculate on either the project or project feasibility, " a spokesperson said.

CNN: Can plan to fly Concorde again get off the ground?

But I don't want to speculate on what the Florida Supreme Court will do.

CNN: Transcript: Gore talks with reporters outside the White House

But I don't want to speculate on other measures that may or may not be considered.

WHITEHOUSE: Press Briefing