Life on Earth will become unsustainable unless population growth is held in check.

地球上的生命将无法延续，除非人口增长得到控制。

《柯林斯英汉双解大词典》

It's not only unsustainable for workers, but also for the companies that employ them.

这不仅对工人是不可持续的，对雇佣他们的公司也是如此。

youdao

Peter Orszag, Obama's Budget Director, recently called the US budget deficits unsustainable and he's right.

奥巴马政府的预算主管彼得·奥斯泽格最近称，美国的预算赤字是不可持续的，他是对的。

youdao

The treasury secretary did not dispute Republican contentions that mounting federal deficits are creating an unsustainable level of national debt.

VOA: standard.2009.11.01

David Pred of Bridges Across Borders, a group that helps farmers, says big plantations are unsustainable because they leave many families with nothing.

VOA: standard.2010.06.02

It earned 2.6 percent over costs last year, a figure Baker says is unsustainable.

VOA: standard.2010.02.25

The counter-narratives put forward by the Bishops and by Ginny Polio are also unsustainable.

NEWYORKER: A Loaded Gun

Here is the corollary of that unfortunate nexus between weak trade and unsustainable high government borrowing.

BBC: It's trade or bust for Britain

But what is true is that the path we're on right now is unsustainable.

WHITEHOUSE: Town Hall in Los Angeles