例句：
Think about where fish and shellfish live.
想想鱼类和贝类所生活的环境。
He collected shellfish and other sea treasures.
他收集贝类以及其他海洋珍品。
They made a living as divers, spearfishing or harvesting shellfish.
他们以潜水、鱼叉捕鱼或收获贝类为生。
The plover lives by the ocean and feeds on small shellfish, insects and plants.
它们生活在海边，以小贝类海鲜、昆虫和植物为食。