它们的生产数量有限。

They are produced in limited quantities.

《新英汉大辞典》

一个关键问题是如何在资源有限的情况下生产更多的粮食。

One key issue is how to produce more food in a world of finite resources.

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丹麦自然资源匮乏，生产能力有限；未来它在欧洲将成为一个经纪人、银行家和商品经销商。

Denmark has few natural resources, limited manufacturing capability; its future in Europe will be as a broker, banker, and distributor of goods.

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