Thfa
[化] 四氢叶酸
🗣️ 情景例句
How about a cup of coffee, Son?
来杯咖啡怎么样， 孩子？
You cannot flay the same ox twice.
一头牛不能剥两次皮。
modern states 'invest'in institutions of learning to get back 'interest'
现代国家对教育机构投资，收回的"利息