Mna
abbr. 甲基壬基乙醛（Methyl Nonyl Acetaldehyde）；護理管理學碩士（Master of Nursing Administration）
??? 情景例句
We had a cat when I was eight years old.
我八歲時養過一只貓。
Why did't you go home?
為什么你不回家？
I must always keep on trying to do my best.
我必須始終繼續作出最大的努力。