The immense nebula contains at least a dozen brilliant stars that are roughly estimated to be at least 50 to 100 times the mass of our Sun.

这片巨大的星云包含了至少十几个明亮的恒星，粗略估计它们的质量都至少是50-100倍太阳质量。

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One example is in the country's southern province of Helmand, where the Independent Election Commission recorded roughly 135,000 votes, but the United Nations estimated between 5,000 and 38,000 people actually voted.

VOA: standard.2009.10.07

Then from 1820 to 1860, the forty years before the war, an estimated roughly two million American slaves were sold to satisfy the need of slave labor in the great cotton kingdom of the growing Southwest.

之后从1820年到1860年,这战争前的四十年间,据粗略统计有大约两百万美国奴隶被出售,以满足西南部,这个日益增长的棉业帝国对奴隶劳工的需求

耶鲁公开课 - 美国内战与重建课程节选

It was roughly estimated that up to 10, 000 books were destroyed or badly damaged.

BBC: The curious tale of the stolen books

Iraqi Kurds, roughly estimated at five million, have stunningly rebuilt a dirt-poor and traumatised society from scratch since they gained their autonomy in 1991.

BBC: Iraq 10 years on: Good times in Kurdish Irbil

The rule also established reforms for cost allocation, most notably that costs allocated to a transmission facility must be roughly commensurate with estimated benefits.

FORBES: New Transmission Lines: Coming to an Area Near You?