第二島鏈

1. • Second Island Chain, strategic arc of islands stretching from Japan's Bonin Islands to Guam and Papua New Guinea

     geopolitics

Character by character

• 第(dì)(prefix indicating ordinal number, as in 第六 dìliù "sixth")
• 二(èr)two
• 島(dǎo)island
• 鏈(liàn)chain