福尔克和其它经济学家的这份报告对建于1800年之前和以后的29家歌剧院进行了考察。
The study by Mr. Falck and the other economists examined 29 opera houses built before 1800 or just afterward.
但是这项研究的作者们认为这些器械在经过回收处理以后，其安全性和无毒性与之前并没有什么差别。
But the study's authors say that following reprocessing, there's no difference in safety and sterility.
在深入了解本文的自定义插件创建部分之前，需要讨论一下part和nodepart，因为这两者在以后的章节中非常重要。
Before diving into the custom plug-in creation part of this article it is worth talking about parts and nodeparts since they figure heavily in the following sections.
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