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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The district spent $121, 000 on the “Primary Mathematics” books and $24, 632 for teachers’ materials.

学区花了121000美元购买《基础数学》书籍，花了24632美元购买老师资料。

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I've just spent a year filming a new PBS Nova miniseries about, of all things, materials science.

我刚花了一年时间来拍摄一部新的美国公共广播公司(PBS Public Broadcasting Service)新星(Nova)电视剧系列，首先是材料科学。

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Investigators in hazardous materials suits spent most of Saturday executing a search warrant at a three-story apartment building in downtown Spokane.

NPR: FBI: Arrest Made In Wash. State Ricin Letter Scare

Before that, he spent a decade running the materials research institute at Princeton University, and nearly as much time at Exxon, in charge of research and development.

NEWYORKER: The Climate Fixers

Some of them may be spent on technology, on building materials, on school materials.

WHITEHOUSE: Press Briefing