at an alarming rate
驚くべき速さで
at an all-time low [high]
史上最低［最高］で
at an early age
幼い［若い］頃に
at an early date [day]
近いうち［近日］に
at an [this] early date
以前に［のこの時点で］
at an early stage
初期の段階で
at an expense of 3 dollars
３ドル出して
at an extraordinary speed
途方もないスピードで
at an outrageous price
べらぼうな値段で
at an unholy price
法外な値段で
