Tert.-butylacetic acid
[建] 特丁基醋酸, 特己酸
🧩 词语组成解析
🗣️ 情景例句
but, unfortunately,
但是， 很不幸，
Are these books all yours?
这些书全是你的吗？
I find listening really hard. Sometimes it's just impossible to understand.
我觉得听力很难。有时简直听不懂。