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num. 三十，三十个（人或物）4 次
I loved the man from the Thirties research who found that wireless suddenly offered “a lot of variety...things I thought I’d never be interested in...ice hockey perhaps”.
我很喜欢20世纪30年代那项调查中的一位男士，他发现无线电突然提供了“大量多样的内容……一些我以为自己永远不会感兴趣的东西……比如冰球”。
When finding their way to waterholes, they headed off in exactly the right direction, on one occasion from a distance of roughly thirty miles.
在寻找通往水坑的路时，它们会朝着完全正确的方向出发，有一次甚至是从大约三十英里之外。
Protests have erupted over construction of the Thirty Meter Telescope (TMT), a giant observatory that promises to revolutionize humanity’s view of the cosmos.
围绕三十米望远镜（TMT）的建设爆发了抗议活动，这座巨型天文台有望彻底改变人类对宇宙的认识。
“Thirty years ago, it would have been inconceivable to have imagined a ban on smoking in the workplace or in pubs, and yet that is what we have now.
“三十年前，人们无法想象会在工作场所或酒吧禁烟，然而这正是我们现在的情况。