洞穴潜水
When Stefano Brunelli was growing up on the Italian island of Sardinia, he used to spend his summers swimming in the ocean. "The coastline here is very special," he says. "There are lots of caves in the rocks. My friends and I used to dive into these caves to look around them."
2023-10-13(万方平台首次上网日期,不代表论文的发表时间)
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