Exactly four years ago, 171 people died in a similar disaster at Dongfeng Mine, another major colliery of the Longmei Group.

就在四年前，在同属龙媒集团的东风煤矿一次相似矿难中，171人死亡。

youdao

That's exactly why the Centers for Disease Control began recommending rapid HIV screening in emergency departments and other health care settings four years ago.

VOA: standard.2010.07.23

"At the end of the day, the Prime Minister of Israel said exactly four years ago to the day that he is for a two-state solution, " emphasised Dror Moreh.

BBC: The Gatekeepers: Israeli Shin Bet chiefs on film

Or to the designs of an ancient plot set in motion exactly four hundred years ago in the library of the King of Bohemia.

NPR: Excerpt: 'Borges and the Eternal Orangutans'

Exactly half of the voters polled, 50% say they are optimistic about the next four years ago and the number of American voters who say that the US is headed in the right direction is up to 38%, with 47% saying things are off on the wrong track.

FORBES: As Fiscal Deadline Approaches, Obama Has Public Support