Nitrogens
(nitrogen 的复数) n. 氮\\n[化] 氮N-2
🗣️ 情景例句
How did you feel?
感觉怎么样？
He likes playing the organ.
他喜欢拉风琴。
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。