noun 下载 🔗分享 硅藻,硅藻类。 Any of a group of minute unicellular algae having a siliceous covering of great delicacy, now categorized as class Diatomophyceae or division Bacillariophyta. Examples : "Microscopic diatoms in the ocean produce a large portion of the Earth's oxygen. " 海洋中微小的硅藻类产生了地球上很大一部分的氧气。 organism biology microorganism plant nature environment ecology science 与AI对话词汇游戏阅读练习