He spent 27 years writing Compendium of Material Medica.

他花了27年撰写了《本草纲目》。

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Designers spent more than one year choosing and testing ideal materials, and finally picked a new kind of material that can resist the very difficult conditions on the Moon.

设计师们花了一年多的时间选择和测试理想的材料，最终挑选出一种能够抵御月球上异常恶劣条件的新型材料。

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After he was done promoting the book, Franzen spent a year sifting through material he'd discarded from it, to see if he could recycle anything.

对这书的宣传工作结束后，弗兰岑花了一年时间去筛选之前未写进书中的材料，看能否再回收利用一些。

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Both sides are expressing concern over North Korean statements on Friday that Pyongyang is continuing to extract plutonium from spent nuclear fuel for material useable in weapons.

VOA: standard.2009.09.06

The trust maintained that the time that the President, who was the trustee, spent running the company constituted material participation by the trust.

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Izhar Gafni, from Israel, spent 18 months just folding the material every-which-way in order to discover a strong enough design, and now he claims his technique is almost ready for mass production.

ENGADGET: Cardboard bicycle 'close to mass production': tough, green and just $20

Mr Yates said he did not re-examine the 11, 000 pages of material recovered from Mulcaire's home but spent eight hours considering the matter, and consulted the Crown Prosecution Service, but decided there was no likelihood of further convictions.

BBC: Phone hacking probe: NoW goes into print for last time