Methanobacteria
甲烷桿菌
🗣️ 情景例句
Western countries have evry strict visa requirements.
在西方国家有严格的签证要求。
It's snowing.
外面正在下雪。
As a reasonable guess, they might, on an average, be 100 light years away.
据合理推算，外星人离我们平均距离也有100光年之远