1 文書を見つけるための辞書。

• drop, free fall, dip, fall
• 落し, 減少, 低下, 下落
• a sudden sharp decrease in some quantity; "a drop of 57 points on the Dow Jones index"; "there was a drop in pressure in the pulmonary artery"; "a dip in prices"; "when that became known the price of their stock went into free fall"
• ある量の突然の急激な減少