sustain是什么意思？

A new Peabody study of the Tennessee Voluntary Pre-K program reports that pre-K works, but the gains are not sustained through the third grade.

But, in the years that followed, her sustained tutoring suggested that Kafka might be wrong about the solitude.

marriages are hard to sustain without social or family pressures

The problem is that such an impulse is hard to sustain Across the country, many similar families were unable to maintain the initial boost in morale(士气).

It cannot be sustained when friends move far apart.

Some of those small mammals help to sustain such big birds as golden eagles.

The idea is that we are taking more out of what you might call the planet's environmental bank balance than it can sustain; we are living beyond our ecological means.

For almost five centuries a very large supply of cod ( ' , 鳕 鱼) provided abundant raw material for an industry which at its peak employed about 40,000 people, sustaining entire communities in Newfoundland.

Without sustained external pressure it seems certain Mr.

In its 1994 report, the World Bank argued that the current pension system in most countries could not be sustained in the long term.

not be sustained in the long term