Cosmic background radiation
宇宙背景辐射
🧩 词语组成解析
🗣️ 情景例句
One of my patients has a high fever,
我的一位病人发高烧，
What's goes on here?
什么事？
Only the Earth provides ideal conditions, and even here it has taken more than four billion years for plant and animal life to evolve.
只有地球提供理想的条件，而即使在这里，植物和动物的进化也用了40亿年的时间。