Ferribacterium
铁杆菌属
🗣️ 情景例句
but, unfortunately,
但是， 很不幸，
Today is the first day of spring.
今天是春天的第一天。
Speculations about is nature have been going on for literally thousands of years,
人们对睡眠作用的种种猜测，确实有数千年之久。