Chitosan
[药]壳聚糖, 脱乙酰壳多糖, 脱乙酰几丁质, 聚氨基葡萄糖
🗣️ 情景例句
Where are your manners?
你的规矩哪里去了？
You know the proverb, Smile and the world smiles with you, cry and you cry alone.
要知道有句格言“微笑，世界与你同欢乐；哭泣，你只能独自悲伤”。
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。