她说这只是个小错误，但我觉得她低估了问题的严重性。

She said it was just a small mistake, but I think she's ___understating the seriousness of the problem.

说这次风暴'有点风'是明显低估了它的破坏力。

Calling the storm 'a bit windy' is clearly ___understating its destructive power.