- 硬: hard; stiff; tough
- 基岩: base rock; basement rock; basic rock; batholite; batholith; bedding rock; bedrock; bottom rock; foundation rock; ledge rock; main bottom; mother rock; original rock; pedestal rock; shelf; solidrock
- 硬基地: hard base
- 硬基土: hard subsoil
- 导弹硬基地: hard missile base
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