unsustainably
adverb uk/ˌʌn.səˈsteɪ.nə.bli/ us/ˌʌn.səˈsteɪ.nə.bli/
无法维持（或支撑、忍受等）地
in a way that cannot continue over a period of time
Prices have been set unsustainably high for years. 多年来价格一直处于不可忍受的高位。
破坏生态平衡地，不可持续地
in a way that causes damage to the environment and is therefore not able to continue for a long time
Water is being used unsustainably and is running out. 水在以一种不可持续的方式使用，而且正在耗尽。