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1·The swift growth of this merchant marine diversified the northern colonial economy and made it more self-sufficient.

这艘商船的迅速发展使北方殖民地经济多样化，使其自给自足的能力更强。

2·After 1815 improved transportation enabled more and more western farmers to escape a self-sufficient way of life and enter a national market economy.

1815年以后，交通的改善使越来越多的西方农民摆脱了自给自足的生活方式，进入了国家市场经济。

3·The country is totally self-sufficient in food production.

在粮食生产上，这个国家完全做到了自给自足。《牛津词典》

4·This enabled the country to become self-sufficient in sugar.

这使得该国在食糖方面变得自给自足了。《柯林斯英汉双解大词典》

5·Although she had various boyfriends, Madeleine was, and remains, fiercely self-sufficient.

尽管有过各种各样男朋友，马德琳过去和现在一直都非常自立。《柯林斯英汉双解大词典》

6·This period was more disastrous for farmers than earlier times had been, because farmers were no longer self-sufficient.

对农民来说，这一时期比以往更具有灾难性，因为农民不再能自给自足。

7·The technology raises the prospect of Britain becoming self-sufficient in renewable energy and drastically reducing its carbon dioxide emissions.

这项技术提高了英国在可再生能源方面实现自给自足和大幅减少二氧化碳排放的前景。

8·The increased productivity from farmland made some countries self-sufficient in grain and livestock, and offered effective protection against famine.

农田生产力的提高使一些国家在粮食和牲畜方面能自给自足，并为防止饥荒提供了有效的保护。

9·They must be self-sufficient.

他们必须有自给自足的能力。

10·Believe others should be more self-sufficient.

认为别人应该更自立。