[Geography] Volcano Islands (A group of Japanese islands in the northwest Pacific Ocean north of the Mariana Islands. Annexed by Japan in the late 19th century, the islands were administered by the United States from 1945 until )是什么意思 [Geography] Volcano Islands (A group of Japanese islands in the northwest Pacific Ocean north of the Mariana Islands. Annexed by Japan in the late 19th century, the islands were administered by the United States from 1945 until )怎么读