Instability constant
[化] 不稳定常数
🧩 词语组成解析
🗣️ 情景例句
He should just about get by in the exam.
他这次考试还能勉强及格。
Knowledge is a treasure, but practice is the key to it.
知识是一座宝库，实践是打开宝库的钥匙。
He has a son and a daughter.
他有一个儿子和一个女儿。