Nigrometer
黑度计
🗣️ 情景例句
He's coming over to talk about it.
他就是要来谈这个问题。
People are always changing, aren't they?
人总是在变，不是吗？
Though the doctors did his best, the patient's recovery was slow.
尽管医生竭力医治，但病人恢复缓慢。