He spotted the group at a distance of one mile. 他在一英里外就看到了那伙人。A shark can smell blood at a distance of half a kilometer.鲨鱼能在半公里外闻到血腥味。This law is known to hold true for galaxies at a distance of at least several billion light years.已知这条定律同样适用于距离至少几十亿光年远的星系。