Pir
abbr. 蛋白序列数据库（Protein Identification Resource）；聚三聚氰酸酯
🗣️ 情景例句
Richard, isn't that too much to ask of your mother?
Richard，那是不是太麻烦你母亲啦？
How much is a round-trip ticket to Beijing?
一张到北京的来回票要多少钱？
and some of these propositions have been violently opposed.
对风俗的研究才是全面的，才会有收获。