It probably has some risk, but the way we approximate things in finance, we take the government as riskless.

它可能存在一定的风险，但在金融学上，我们忽略其风险，将政府债券看作无风险。

耶鲁公开课 - 金融市场课程节选

At least in some approximate sense that's what they are doing.

从某种程度来说,他们就是做这个的。

耶鲁公开课 - 金融市场课程节选

He has on top of his head a helmet made of bronze, perhaps weighing about five pounds, these are approximate; they would have differed from person to person to some degree.

他的头部有铜质头盔,头盔大概重五磅,这只是大概的重量,实际重量因人而异

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You might ask, well is this an approximate formula?

你们可能会问,这是一个约等式吗

耶鲁公开课 - 金融市场课程节选