Quadrine
[化] α-氨基丁酸; α-氨基正丁酸
🗣️ 情景例句
Make yourself at home.
勿客气。
Textile business has become more and more difficult since the competition grew.
随着竞争的加剧，纺织品贸易越来越难做了。
What are those?
那些是什么？