Number two is lack of material to recite.

第二是缺乏背诵资料。

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Pretty soon we were held up for lack of material.

不久，由于缺乏材料，我们进行不下去了。

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This installment rectifies the lack of material about agile architecture.

这一期填补了敏捷构架材料缺失的空白。

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Although the sector is hardly glamorous and the lack of raw material makes India, by Thapar's own admission "not the best place to make paper, " the country is one of the world's fastest-growing paper markets.

FORBES: Magazine Article

In the case of bitcoin, a strong case can be made that, even with secondary markets, certain virtual currencies lack the legal elements of material value and property.

FORBES: WinPoker Becomes First Major Gambling Operator To Adopt Bitcoin

For those frustrated by the slowness of the internet and the lack of broadband access, a company called Espresso sends a wide range of material to schools by satellite, which is then made available on an intranet.

BBC: Future imperfect?