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在美国，应用最早的天文台有加利福尼亚州圣荷西市的利克天文台，威斯康辛州威廉斯湾的叶凯士天文台。
In the U.S., observatories such as Lick in San Jose, Calif., and Yerkes in Williams Bay, Wisc., were among the first to show the uses of big observatories.
通过最新研制的消声器，凯士比公司成功将21年前生产的一台噪音很大的大型机泵的声音降低了20分贝。
With its newly developed diffuser, the KSB Group has managed to lower by 20 dB the noise emission of a large pump produced 21 years ago in what was then the GDR.
弗吉尼亚州费尔法克斯郡的乔治·马松大学，研究幸福感的心理学副教授托德。凯士丹说，这些发现意义重大，虽然他还没有看到这项研究。
Although he has not read the study, Todd Kashdan, an associate professor of psychology at George Mason University in Fairfax, Va., who studies well-being, says these findings make perfect sense.
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