unsustainable
US
UK unsustainable adj: (that cannot be maintained)
SC 不能维持的 bù néng wéi chí de
SC 不可持续的 bù néng wéi chí de，bù kě chí xù de
Our use of fossil fuels is unsustainable because they will run out one day.
unsustainable adj: (that cannot be supported)
SC 不能支撑的 bù néng zhī chēng de
SC 不能证实的 bù néng zhī chēng de，bù néng zhèng shí de
SC 不能成立的 bù néng zhī chēng de，bù néng chéng lì de
The government's policy on taxation is unsustainable because it is unfair.