In 2000 the census takers reported an undercount of 1.81%.

2000年的人口普查工作者称大约有1.81%的人未被统计。

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In fact, this figure may severely undercount the true number of poisonings since many sufferers attribute their flu-like symptoms to something other than contaminated seafood.

事实上，这个数字可能严重低估了真正的中毒人数，因为许多患者把流感症状归罪于其它原因而不是受污染的海鲜。

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You accept uncritically the view of one professor who has dismissed the 1990 census undercount as inconsequential.

ECONOMIST: Letters

Only 680, 000, though the internal migration data for Africa are weak and therefore a comparative undercount is likely.

FORBES: 5+ Million Chinese Abroad--But India's Got More

That turned to out to be a 27% undercount (based on the consensus of 42.7 million iPads sold in 2011).

FORBES: Connecting marketers to the Forbes audience. What is this?