我们把法国南部和其他地方的洞穴壁画赞誉为杰作，它们的历史可以追溯到大概2万年前。
We hail as masterpieces the cave paintings in southern France and elsewhere, dating back some 20,000 years.
根据OM B历史文档，这三年，预算赤字大概在GDP的2%之下。
According to OMB historical documents, the budget deficit averaged just under 2 percent of GDP during those three years.
在宇宙一百三十七亿年的历史中，大概在前几个十亿年里，整个宇宙都无法让生命生存。
The entire universe was, therefore, a nonhabitable zone for perhaps the first few billion years of its 13.7-billion-year history.
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