circum-Pacific island arc

例句：

1. 1. Thecircum-Pacific islandarc is a natural barrier that separatesthe Pacific Ocean from the Indian Ocean.
   环太平洋岛弧是一个自然屏障，将太平洋与印度洋分隔开来。
2. 2. The circum-Pacific island arcis home to many unique species of plantsand animals.
   环太平洋岛弧是许多独特植物和动物的家园。
3. 3. The circum-Pacific island arcis also known for its rich mineral resources.
   环太平洋岛弧也以其丰富的矿产资源而闻名。