An island in the southern Atlantic northwest of St. Helena. Discovered by the Portuguese on Ascension Day in 1501, it was taken by the British in 1815 and has been administered by St. Helena since 1922.亚森松岛:大西洋南部一岛,位于圣赫勒拿岛的西北部,在1501年耶稣升天节由葡萄牙人发现,1815年由英国占领,自1992年起由圣赫勒拿管理