The original owners could not sustain the necessary level of investment so the company has now been sold.

This planet cannot sustain the current level of population growth rates.

Whether that's true or not, one thing is for certain: the government can no longer sustain the current level of subsidy.

The news reignited worries that the economy cannot sustain the growing level of global debt.

Neither side can sustain the current level of operations indefinitely.

"Now the issue is whether we will sustain the apparently lower level of inflation."

"The world cannot indefinitely sustain the present level of imbalances."

Unfortunately, the margins won't sustain the level of investment that staying in the game demands.

Maybe its population had been too thin to sustain the Victorian level.

"We couldn't sustain the level of the past few months, so last month's figures are a yellow warning flag."