The ocean is vast and mysterious.（海洋广阔而神秘。）I love going to the beach and listening to the sound of the ocean.（我喜欢去海滩听海洋的声音。）The ocean is home to many different species of marine life.（海洋是许多不同种类的海洋生物的家园。）Pollution is a major threat to the health of the ocean.（污染是海洋健康的主要威胁。）The ocean is a beautiful and powerful force of nature.（海洋是自然界美丽而强大的力量。）