a passenger [an express, a commuter, a rapid] train
旅客［急行，通勤，快速］列車
a precipitous rising of prices
物価の急騰
a problem of great urgency
非常に緊急な問題
a rapid climb to stardom
スターダムへ急速に上りつめること
a rapid [sharp, steep] decline in prices
物価の急落
a rapid expansion [decline]
急激な拡大［衰退］
a rapid rise to power [fame]
急速な権力［名声］の獲得
a rapidly swelling population
急増する人口
a rush order
急ぎの注文
a sharp increase in the price
物価の急上昇
