1. The protist is a diverse group consisting of various organisms, including amoeba and algae.
原生生物是一个多样化的群体，包括阿米巴和藻类等各种生物。
2. Protists play an important role in the marine ecosystem as primary producers and as a source of food for other organisms.
原生生物在海洋生态系统中扮演着重要的角色，作为初级生产者和其他生物的食物来源。