Sirna
abbr. small interfering RNA 小片段干擾核糖核酸，干擾性小核糖核酸
??? 情景例句
What classes are mandatory for your major?
你的專業什么課是必修的？
Good work.
做得很棒！
As long as all was still, the pen drew a straight line,
只要一切都是靜止的，筆就會劃出一條直線；