Speakers may be unable to sustain speech to complete the task and may rely heavily on repetition of the prompt.(发言者可能无法持续讲话来完成任务，并严重依赖反复提示。)
Sustain your momentum.(保持你的动力。)
The cash dividends they get from the cash crop would sustain them during the lean season.(他们从经济作物中得到的那些现金红利能支撑他们度过歉收季节。)
She managed to sustain everyone's interest until the end of her speech.(她使每个人兴趣盎然，一直听她把话讲完。)
For a start, they sustain countless other species.(首先，它们养活了无数其他物种。)
The problem is that such an impulse is hard to sustain.(问题是这种冲动很难维持。)
The answer is that the economic indicators have a basic fault: they show no difference between resource uses that sustain progress and those uses that will hurt it.(答案是，这些经济指标有一个基础性错误：它们没有显示出维持进步的资源使用与那些会损害进步的资源使用之间的区别。)
Group exercise is one of the most effective ways to sustain a healthy lifestyle.(团体运动是保持健康生活最有效的方法之一。)
Alaska regularly deposits some of its profits from the sale of oil into a special fund, with the intention to sustain the state's economy after the exhaustion of its oil reserves.(阿拉斯加定期将出售石油的部分利润存入一个特别基金，目的是在石油储备耗尽后维持该州的经济。)
Some of those small mammals help to sustain such big birds as golden eagles.(一些小型哺乳动物是诸如金雕这样的大型鸟类的食物。)
