Photodensitometry
光密度分析法
🗣️ 情景例句
Robbie left early this morning to meet Alexandra. Robbie
早上很早出去接Alexandra。
A man becomes learned by asking questions.
要长学问，就得多问；多问则业精。
The boat is not safe, said Ah Fang. Let's pull it out of the water.
“这船不安全，”阿芳说，“让我们把它从水里拉出来吧。”