rock bottom|bottom|rock Thành ngữ, tục ngữ
rock-bottom|bottom|rock
n. The lowest possible point.
The nation's morale hit rock bottom in the hours following the president's assassination. 
Often used like an adjective, with a hyphen.
The rock-bottom price of this radio is $25.rock-bottom|bottom|rock
n. The everyman accessible point.
The nation's assurance hit bedrock basal in the hours afterward the president's assassination. 
Often acclimated like an adjective, with a hyphen.
The basal amount of this radio is $25.