生态脆弱地区 ecologically fragile areas

软弱地基 soft ground ; soft foundation ; weak foundation

薄弱地层 weak formation

虚弱地 weakly ; unsteadily ; infirmly

微弱地 faintly ; weakly ; feebly

软弱地 weakly ; flabbily ; schlaff

脆弱地 frailly ; flimsily

衰弱地 feebly

柔弱地 feebly ; femininely

新生地及软弱地层改良 Reclamation and Soft Ground Improvement