| 例句 |
This level of spending is unsustainable.这种开销持续不了多久。They have already seen their total debts spiral back towards unsustainable levels.他们已经看目睹其债务总额急剧增长，又回到了不能维持下去的水平。The current rate of economic growth is unsustainable.目前的经济增长速率难以持续。The current system is unsustainable.当前的体制是无法维持的。Life on Earth will become unsustainable unless population growth is held in check.如不控制人口增长，地球上的生命将无法持续。 |