Pir
abbr. 蛋白序列数据库（Protein Identification Resource）；聚三聚氰酸酯
🗣️ 情景例句
When the bough breaks,
树枝若折断
Excuse me? I didn't hear what you said.
对不起，我没有听清你说的话。
He sat with his arms across the chest.
他双臂交叉于胸前的坐在那里。