Marine life was discovered at depths previously thought to be azoic.

在先前被认为没有任何生命迹象的海洋深处发现了海洋生物。

《牛津词典》

The drug is to be reclassified after trials showed it to be more harmful than previously thought.

试验显示这种药比先前想象的危害更大，要重新归类。

《牛津词典》

The team at Stanford investigated the aquifers below this depth and found that reserves may be triple what was previously thought.

斯坦福大学的研究小组对这一深度以下的地下蓄水层进行了调查，发现蓄水量或许是先前所预想的三倍。

youdao

Thousands of young people, who had previously thought of themselves as part of an isolated minority, experienced the euphoric sense of discovering that they are, as the saying goes, what's happening."

VOA: special.2009.08.10

The discovery raised the level of concern that the invasive species was closer to Lake Michigan than previously thought.

VOA: standard.2010.07.20

Explorer Pen Hadow led a two-and-a-half-month trek earlier this year that revealed Arctic ice is melting faster than previously thought.

VOA: standard.2009.12.13

And given how large that permanent war chest is, he can target companies previously thought unassailable.

FORBES: Carl Icahn Unleashed: Wall Street's Richest Man Is On The Attack -- Just Ask Michael Dell

The eurozone recession will also be deeper and more prolonged than previously thought, it added.

BBC: Global recovery under threat, says OECD

One thing they agree on, however, is that sales will be significantly less than previously thought.

FORBES: The Tysabri Game Plan