keyhole urchins
plural of Sverdrup
An economic philosophy stating that things found in nature, most importantly land, belong equally to all. It is usually associated with the idea of a single tax on the value of land.
plural of keyhole urchin
(Britain, informal) Keith Chegwin (1957–2017), English actor and TV presenter.
科学者たちは、干潮時の調査でサンゴ礁の瓦礫の間に隠れている鍵穴状のウニをいくつか発見した。
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